Yuliya Dobrydneva, Emily Wilson, Christopher J Abelt and Peter F Blackmore. "Phenolphthalein as a prototype drug for a group of structurally related calcium channel blockers in human platelets." Journal of Cardiovascular Pharmacology Vol. 53 Iss. 3 (2009) p. 231 - 240
Available at: http://works.bepress.com/christopher-abelt/13/