1. Y. Machida, T. Nagai, in D.D. Breimer, D.J.A. Crommelin, K.K. Midha. (Eds.), Topics in Pharmaceutical Sciences, 1989, pp. 211–221.
2. Chitin/chitosan isolierung, charakterisierung, anwendung;Block,1997
3. S.S. Sabnis, Ph.D. Dissertation, Duquesne University, Pittsburgh, PA, 1996, pp. 78–80.
4. In vitro evaluation of mucoadhesive properties of chitosan and some other natural polymers