Koolen, M. J., Osterhaus, A. D., Van Steenis, G., Horzinek, M. C., & van der Zeijst, B. A. (1983). Temperature-sensitive mutants of mouse hepatitis virus strain A59: Isolation, characterization and neuropathogenic properties. Virology.

Koolen, Marck J.M., Albert D.M.E Osterhaus, Gijsbert Van Steenis, Marian C. Horzinek, and Bernard A.M van der Zeijst. "Temperature-sensitive Mutants of Mouse Hepatitis Virus Strain A59: Isolation, Characterization and Neuropathogenic Properties." Virology 1983.

Koolen, Marck J.M., et al. "Temperature-sensitive Mutants of Mouse Hepatitis Virus Strain A59: Isolation, Characterization and Neuropathogenic Properties." Virology 1983.