Eskola, Satu, Marja Lauhikari, Hanna-Marja Voipio, Matti Laitinen, and Timo Nevalainen. 1999. “Environmental Enrichment May Alter the Number of Rats Needed to Achieve Statistical Significance”. Scandinavian Journal of Laboratory Animal Science 26 (3). https://doi.org/10.23675/sjlas.v26i3.845.