Capolongo, Laura, Nadia Amboldi, Dario Ballinari, Paolo Cozzi, Giulia Melegaro, Marina Ripamonti, Fabrizio Vaghi, and Maria Grandi. 1994. “Reversal of Multidrug Resistance by New Dihydropyridines With Low Calcium Antagonist Activity”. Acta Oncologica 33 (7):787-91. https://doi.org/10.3109/02841869409083949.