APA (7th ed.) Citation

Nielsen, J., & Hansen, V. L. (1986). Collected mathematical papers. Birkhauser.

Chicago Style (17th ed.) Citation

Nielsen, Jakob, and Vagn Lundsgaard Hansen. Collected Mathematical Papers. Boston ; Basel: Birkhauser, 1986.

MLA (8th ed.) Citation

Nielsen, Jakob, and Vagn Lundsgaard Hansen. Collected Mathematical Papers. Birkhauser, 1986.