1. Skjask-Braek G., Anthonsen T., Sandford P. Chitin and Chitosan: Sources, Chemistry, Biochemistry, Physical Properties and Applications. Elsevier Science Publishers, New York, NY 1989; 50–52
2. Kuchler R. J. Biomedical Methods in Cell Culture and Virology. Dowen, Hutchinson and Ross, Inc., Strandsburg, PA 1997; 17–19