APA (7th ed.) Citation

Pontrjagin, L. S. (1986). Selected works. Gordon and Breach Science Publishers.

Chicago Style (17th ed.) Citation

Pontrjagin, Lev S. Selected Works. New York, NY [u.a.]: Gordon and Breach Science Publishers, 1986.

MLA (9th ed.) Citation

Pontrjagin, Lev S. Selected Works. Gordon and Breach Science Publishers, 1986.

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