Gray, B. (1970). The HOPF invariant and related problems. Aarhus Universitet, Matematisk Institut.
Chicago Style (17th ed.) CitationGray, Brayton. The HOPF Invariant and Related Problems. [Aarhus, Denmark]: Aarhus Universitet, Matematisk Institut, 1970.
MLA (8th ed.) CitationGray, Brayton. The HOPF Invariant and Related Problems. Aarhus Universitet, Matematisk Institut, 1970.
Warning: These citations may not always be 100% accurate.