APA (7th ed.) Citation

Zakharov, V. E., & Calogero, F. (1991). What is integrability? Springer-Verlag.

Chicago Style (17th ed.) Citation

Zakharov, V. E., and Francesco Calogero. What Is Integrability? Berlin ; New York: Springer-Verlag, 1991.

MLA (9th ed.) Citation

Zakharov, V. E., and Francesco Calogero. What Is Integrability? Springer-Verlag, 1991.