Cita APA

Landis, E. M. (1998). Second order equations of elliptic and parabolic type. American Mathematical Society.

Citación estilo Chicago

Landis, E. M. Second Order Equations of Elliptic and Parabolic Type. Providence, R.I.: American Mathematical Society, 1998.

Cita MLA

Landis, E. M. Second Order Equations of Elliptic and Parabolic Type. Providence, R.I.: American Mathematical Society, 1998.