Karl Pfleger

Identification and differentiation of benzodiazepines and their metabolites in urine by computerized gas chromatography-mass spectrometry.

H. Maurer, K. Pfleger, Hans Maurer, 1987, Journal of chromatography.

A New Ecology: Systems Perspective

M. Korenberg, C. Lant, M. Zheleznyak, 2007 .