Cita APA

Amster, P., & Tisdell, C. (2007). Two classical periodic problems on time scales. Web

Citación estilo Chicago

Amster, P., and C.C Tisdell. Two Classical Periodic Problems On Time Scales. 2007.

Cita MLA

Amster, P., and C.C Tisdell. Two Classical Periodic Problems On Time Scales. 2007.