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Peptide degradation during preparation and in vitro release testing of poly(L-lactic acid) and poly(DL-lactic-co-glycolic acid) microparticles Witschi, Claudia; Doelker, Eric 1998
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Residual solvents in pharmaceutical products: acceptable limits, influences on physicochemical properties, analytical methods and documented values Witschi, Claudia; Doelker, Eric 1997