APA (7th ed.) Citation

Hofmann, K., & Lawson, J. (2018). In memoriam: Klaus Keimel (1939-2017). Semigroup Forum, 96(2), 199. https://doi.org/10.1007/s00233-018-9929-2

Chicago Style (17th ed.) Citation

Hofmann, Karl, and Jimmie Lawson. "In Memoriam: Klaus Keimel (1939-2017)." Semigroup Forum 96, no. 2 (2018): 199. https://doi.org/10.1007/s00233-018-9929-2.

MLA (9th ed.) Citation

Hofmann, Karl, and Jimmie Lawson. "In Memoriam: Klaus Keimel (1939-2017)." Semigroup Forum, vol. 96, no. 2, 2018, p. 199, https://doi.org/10.1007/s00233-018-9929-2.