Cita APA

Giacomini, H., Giné, J., & Llibre, J. (2006). The problem of distinguishing between a center and a focus for nilpotent and degenerate analytic systems.

Citación estilo Chicago

Giacomini, Héctor, Jaume Giné, y Jaume Llibre. The Problem of Distinguishing between a Center and a Focus for Nilpotent and Degenerate Analytic Systems. 2006.

Cita MLA

Giacomini, Héctor, Jaume Giné, y Jaume Llibre. The Problem of Distinguishing between a Center and a Focus for Nilpotent and Degenerate Analytic Systems. 2006.