Dear friendAnybody having access to the following article is requested to send a copy of the same. It is urgently required for a research scholar.Shigesada, Nanako, and Akira Okubo. "Analysis of the Self-Shading Effect on Algal Vertical Distribution in Natural Waters." Journal of Mathematical Biology 12.3 (1981): 311-26. Print. Dr GOPAKUMAR V. University Librarian,Goa University Taleigao Plateau, Goa. PIN 403 206 gopakumar.v@rediffmail.com Office Phone: 08326519012 Mobile No: 09447056713 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.