APA (7th ed.) Citation

Petreniuk, V. I., & Petreniuk, D. A. (2020). About Structure of Graph Obstructions for Klein Surface with 9 Vertices.

Chicago Style (17th ed.) Citation

Petreniuk, V. I., and D. A. Petreniuk. About Structure of Graph Obstructions for Klein Surface with 9 Vertices. 2020.

MLA (8th ed.) Citation

Petreniuk, V. I., and D. A. Petreniuk. About Structure of Graph Obstructions for Klein Surface with 9 Vertices. 2020.

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