APA (7th ed.) Citation

Yang, D. (1987). Involutive hyperbolic differential systems. American Math. Soc.

Chicago Style (17th ed.) Citation

Yang, Deane. Involutive Hyperbolic Differential Systems. Providence, RI: American Math. Soc, 1987.

MLA (9th ed.) Citation

Yang, Deane. Involutive Hyperbolic Differential Systems. American Math. Soc, 1987.