APA (7th ed.) Citation

Birkenhake, C., & Lange, H. (1990). Symmetric theta-structures.

Chicago Style (17th ed.) Citation

Birkenhake, Christina, and Herbert Lange. Symmetric Theta-structures. Erlangen, 1990.

MLA (9th ed.) Citation

Birkenhake, Christina, and Herbert Lange. Symmetric Theta-structures. 1990.

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