Wizkam’, A. C. P., G. Van Tintelen, and A. C. Beynen. 1989. “Technical Note Communication: Frequency Ofchanging Solid-Walled Cages Does Not Affect Pentobarbitone-Induced Sleeping Time in Rats and Mice”. Scandinavian Journal of Laboratory Animal Science 16 (4). https://doi.org/10.23675/sjlas.v16i4.695.