Asako Nishimura, Kazumasa Naruhashi, Yu Yamamoto, Mami Hamori, Keiko Tabata, Keiko Seto and Nobuhito Shibata 2011. Pharmacokinetic and pharmacodynamic evaluation of a new sustained-release capsules using starch-sponge matrix (SSM) release system for nifedipine in rats. International Journal of Drug Delivery. 3, 2 (Jun. 2011), 270–278.