APA (7th ed.) Citation

Gray, B. (1970). The HOPF invariant and related problems. Aarhus Universitet, Matematisk Institut.

Chicago Style (17th ed.) Citation

Gray, Brayton. The HOPF Invariant and Related Problems. [Aarhus, Denmark]: Aarhus Universitet, Matematisk Institut, 1970.

MLA (8th ed.) Citation

Gray, Brayton. The HOPF Invariant and Related Problems. Aarhus Universitet, Matematisk Institut, 1970.

Warning: These citations may not always be 100% accurate.