AMEER MF, RASHEED SZ. 24 HOUR STABLE ANTI-ANGINAL EFFECT OF RETARD VERAPAMIL, DILTIAZEM & NIFEDIPINE. Pak Heart J [Internet]. 2012May10 [cited 2024Nov.24];38(3-4). Available from: https://pakheartjournal1.pcs.org.pk/index.php/pk/article/view/64