APA (7th ed.) Citation

Button, J. (2012). Strictly ascending HNN extensions in soluble groups. Ricerche di Matematica, 61(1), 139. https://doi.org/10.1007/s11587-011-0120-2

Chicago Style (17th ed.) Citation

Button, J. "Strictly Ascending HNN Extensions in Soluble Groups." Ricerche Di Matematica 61, no. 1 (2012): 139. https://doi.org/10.1007/s11587-011-0120-2.

MLA (9th ed.) Citation

Button, J. "Strictly Ascending HNN Extensions in Soluble Groups." Ricerche Di Matematica, vol. 61, no. 1, 2012, p. 139, https://doi.org/10.1007/s11587-011-0120-2.