1.
Osuna O, Rodríguez-Ceballos J, Vargas-De-León C, Villaseñor-Aguilar G. A note on the existence and construction of Dulac functions. NAMC [Internet]. 2017 Jul. 10 [cited 2024 May 2];22(4):431-40. Available from: https://www.journals.vu.lt/nonlinear-analysis/article/view/13376