APA (7th ed.) Citation

Litjens, B., Polak, S., & Sivaraman, V. (2019). Sum-perfect graphs. Discrete Applied Mathematics, 259, 232-239. https://doi.org/10.1016/j.dam.2018.12.015

Chicago Style (17th ed.) Citation

Litjens, Bart, Sven Polak, and Vaidy Sivaraman. "Sum-perfect Graphs." Discrete Applied Mathematics 259 (2019): 232-239. https://doi.org/10.1016/j.dam.2018.12.015.

MLA (9th ed.) Citation

Litjens, Bart, et al. "Sum-perfect Graphs." Discrete Applied Mathematics, vol. 259, 2019, pp. 232-239, https://doi.org/10.1016/j.dam.2018.12.015.