APA (7th ed.) Citation

Messias, M. (2002). Periodic perturbations of quadratic planar polynomial vector fields. Academia Brasileira de Ciências.

Chicago Style (17th ed.) Citation

Messias, Marcelo. Periodic Perturbations of Quadratic Planar Polynomial Vector Fields. Academia Brasileira de Ciências, 2002.

MLA (9th ed.) Citation

Messias, Marcelo. Periodic Perturbations of Quadratic Planar Polynomial Vector Fields. Academia Brasileira de Ciências, 2002.

Warning: These citations may not always be 100% accurate.