• Author: Spoelstra, K. A. Strijkstra S. Daan
• Title: Ground squirrel activity during the solar eclipse of August 11, 1999.
• Year: 2000
• Reference Type: Journal Article
• Journal/Book Title: Z. Säugetierk.
• Volume: 65
• Pages: 307-308
• Date of Publication: Wednesday, 20 December 2000