APA (7th ed.) Citation

Hacohen-Kerner, Y., Cohen, N., & Shasha, E. (1999). AN IMPROVER OF CHESS PROBLEMS. Cybernetics & Systems, 30(5), 441. https://doi.org/10.1080/019697299125163

Chicago Style (17th ed.) Citation

Hacohen-Kerner, Yaakov, Nahum Cohen, and Erez Shasha. "AN IMPROVER OF CHESS PROBLEMS." Cybernetics & Systems 30, no. 5 (1999): 441. https://doi.org/10.1080/019697299125163.

MLA (9th ed.) Citation

Hacohen-Kerner, Yaakov, et al. "AN IMPROVER OF CHESS PROBLEMS." Cybernetics & Systems, vol. 30, no. 5, 1999, p. 441, https://doi.org/10.1080/019697299125163.