J Pharm Sci. 1978 Aug;67(8):1059-66.
Physicochemical properties of amphoteric beta-lactam antibiotics I:
Stability, solubility, and dissolution behavior of amino penicillins as a function of pH.
Tsuji A, Nakashima E, Hamano S, Yamana T.
- DOI:
http://dx.doi.org/http://10.1002/jps.2600670810