Luytjes, W., Sturman, L. S., Bredenbee, P. J., Charite, J., van der Zeijst, B. A., Horzinek, M. C., & Spaan, W. J. (1987). Primary structure of the glycoprotein E2 of coronavirus MHV-A59 and identification of the trypsin cleavage site. Virology.

Luytjes, Willem, Lawrence S. Sturman, Peter J. Bredenbee, Jeroen Charite, Bernard A.M van der Zeijst, Marian C. Horzinek, and Willy J.M Spaan. "Primary Structure of the Glycoprotein E2 of Coronavirus MHV-A59 and Identification of the Trypsin Cleavage Site." Virology 1987.

Luytjes, Willem, et al. "Primary Structure of the Glycoprotein E2 of Coronavirus MHV-A59 and Identification of the Trypsin Cleavage Site." Virology 1987.