Metabolism and pharmacokinetics of cinobufagin: S. Toma, et al.; Xenobiotica 17, 1195 (1987) Specific 12 beta-hydroxylation of cinobufagin by filamentous fungi: M. Ye, et al.; Appl. Environ. Microbiol. 70, 3521 (2004) Cardiotonic steroids differentially affect intracellular Na+ and [Na+]i/[K+]i-independent signaling in C7-MDCK cells: O.A. Akimova, et al.; J. Biol. Chem. 280, 832 (2005)