APA (7th ed.) Citation

Yang, L. (2002). Isochronous Centers and Isochronous Functions. Acta Mathematicae Applicatae Sinica, 18(2), 315. https://doi.org/10.1007/s102550200031

Chicago Style (17th ed.) Citation

Yang, Li-jun. "Isochronous Centers and Isochronous Functions." Acta Mathematicae Applicatae Sinica 18, no. 2 (2002): 315. https://doi.org/10.1007/s102550200031.

MLA (9th ed.) Citation

Yang, Li-jun. "Isochronous Centers and Isochronous Functions." Acta Mathematicae Applicatae Sinica, vol. 18, no. 2, 2002, p. 315, https://doi.org/10.1007/s102550200031.