APA (7th ed.) Citation

Calude, C., Jain, S., Merkle, W., & Stephan, F. (2020). Searching for shortest and least programs. Theoretical computer science, 807, . https://doi.org/10.1016/j.tcs.2019.10.011

Chicago Style (17th ed.) Citation

Calude, Cristian, Sanjay Jain, Wolfgang Merkle, and Frank Stephan. "Searching for Shortest and Least Programs." Theoretical Computer Science 807 (2020). https://doi.org/10.1016/j.tcs.2019.10.011.

MLA (9th ed.) Citation

Calude, Cristian, et al. "Searching for Shortest and Least Programs." Theoretical Computer Science, vol. 807, 2020, https://doi.org/10.1016/j.tcs.2019.10.011.