Reference

Imme Finger, D. Audi, M. Bernstein, S. Voremberg, K. Harkins, M. Birnbaum, A. Lynn, M. Lawlor (1995): Switching of Paramecium Surface Antigen Types with Purified Antigen and Conditioned Medium Containing 70 kD Proteins – Archiv für Protistenkunde – 146_1995: 373 - 381.