APA (7th ed.) Citation

CS, C., & G, P. (2004). Bio-steps beyond Turing. Bio Systems, 77(1-3), 175. https://doi.org/10.1016/j.biosystems.2004.05.032

Chicago Style (17th ed.) Citation

CS, Calude, and Păun G. "Bio-steps Beyond Turing." Bio Systems 77, no. 1-3 (2004): 175. https://doi.org/10.1016/j.biosystems.2004.05.032.

MLA (9th ed.) Citation

CS, Calude, and Păun G. "Bio-steps Beyond Turing." Bio Systems, vol. 77, no. 1-3, 2004, p. 175, https://doi.org/10.1016/j.biosystems.2004.05.032.