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Investigating gender differential item functioning across countries and test languages for PISA Science items, International Journal of Testing (2009)

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Reverse polyblock approximation for optimization over the weakly efficient set and efficient set, Acta Mathematica Vietnamica (2001)

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A New Approach to Optimization Under Monotonic Constraint (with H Tuy), Journal of Global Optimization (2000)

On equivalence between convex maximization and optimization over efficient set (with L D. Muu), Vietnam Journal of Mathematics (1996)

On convex maximization formulations and decomposable property of optimization problem over the efficient set (with L D. Muu), Preprint, Institute of Mathematics, Hanoi (1995)

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Graduate Skills Assessment : Stage One Validity Study (with Sam Hambur and Ken Rowe), Higher Education Research (2002)

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Effects of item positions on their difficulty and discrimination : A study in PISA Science data across test language and countries, New trends in psychometrics (2009)

Global optimization approach to optimizing over the efficient set (with L D. Muu), Recent advances in optimization (1996)

Evaluation of booklet effect in PISA mathematics across countries, Paper presented at the 8th Conference of the International Test Commission (2012)

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Differential performance of poor readers in international mathematics tests by item formats, Paper presented at the European Conference on Educational Research (2011)

Student perceptions of target language use in the secondary school classroom! (with Bernadette Brouwers), Paper presented at the 18th Biennial Australian Federation of Modern Language Teachers Associations National Conference (AFMLTA2011) (2011)

Investigating item difficulty change by item positions under the Rasch model (with Van Nguyen), Paper presented at the 17th International Meeting of the Psychometric Society (2011)

We need more time! (with Bernadette Brouwers), Paper presented at the NZALT International Biennial Conference (2010)

Effects of student reading proficiency on PISA mathematics items – A DIF study across Countries (with Ray Adams), Paper presented at the PISA Research Conference (2009)

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Effect of Gender and reading ability on questions in the target language in L2 listening tests (with Anna Filipi and Bernadette Brouwers), Paper presented at the Fifth Pacific Rim Objective Measurement Symposium conference (2009)

Investigating effects of the use of the target language characters in the tests of second languages on student performance? (with Anna Filipi), Paper presented at the 6th conference of International Test Commission (2008)

Gender gaps in GAMSAT scores and effects of its candidate language background, age and their academic background (with K MacLeod), Paper presented at the 13th Ottawa International Conference on Clinical Competence (2008)

Examine test-retest performance and effects of gender and ESB in a large-scale postgraduate selection test (with Van Nguyen), Paper presented at the Hawaii International Conference on Education (2008)

Effect of language speaking background on gender difference in verbal and non-verbal reasoning tests : a study from UMAT (with Van Nguyen), Paper presented at the Third Pacific Rim Objective Measurement Symposium conference (2007)

Effects of examinee ability levels on the stability of item difficulty estimates - An empirical study on different estimation methods for the Rasch model (with D Lay), Paper presented at the Third Pacific Rim Objective Measurement Symposium conference (2007)

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Effects of item positions on their difficulty and discrimination : A study in PISA Science data across test language and countries, Paper presented at the 72nd Annual Meeting of the Psychometric Society (2007)

Investigating gender differential item functioning across countries and test languages for PISA science items, Paper presented at the 5th conference of International Test Commission (2006)

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Analysis of differential item functioning, Paper presented at the annual meeting of American Educational Research Association (2006)

Generic skills: can they be measured? (with A Butler and Sam Hambur), Paper presented at the 44th annual forum of the Association for Institutional Research (AIR) (2004)

Cognitive Skills Testing Program (CSTP) 2010 pilot test summary report (with Hamish Bennett Coates, Daniel Edwards, Chris Freeman, Sam Hambur, and Philip Brown), Assoc. Prof. Hamish Coates (2010)

Evaluation of the criterion validity of uniTEST and STAT (with Hamish Bennett Coates, Tim Friedman, and S Ball), Assoc. Prof. Hamish Coates (2008)