Nelis, H. J., Vandenbranden, J., Verhaeghe, B., De Kruif, A., Mattheeuws, D., & De Leenheer, A. P. (1992). Liquid chromatographic determination of ampicillin in bovine and dog plasma by using a tandem solid-phase extraction method.

Nelis, H J., J. Vandenbranden, B. Verhaeghe, A. De Kruif, D. Mattheeuws, und A P. De Leenheer. Liquid Chromatographic Determination of Ampicillin in Bovine and Dog Plasma By Using a Tandem Solid-phase Extraction Method. 1992.

Nelis, H J., et al. Liquid Chromatographic Determination of Ampicillin in Bovine and Dog Plasma By Using a Tandem Solid-phase Extraction Method. 1992.