Vulpe Nicolae: Family of quadratic differential systems with invariant parabolas: a complete classification in the space R12. (2024)
Bujac Cristina and Schlomiuk Dana and Vulpe Nicolae: The family of cubic differential systems with two real and two complex distinct infinite singularities and invariant straight lines of the type (3, 1, 1, 1). (2023)
Bujac Cristina and Vulpe Nicolae: First integrals and phase portraits of planar polynomial differential cubic systems with invariant straight lines of total multiplicity eight. (2017)
Bujac Cristina and Vulpe Nicolae: Classification of cubic differential systems with invariant straight lines of total multiplicity eight and two distinct infinite singularities. (2015)
Artés Joan C. and Llibre Jaume and Rezende Alex C. and Schlomiuk Dana and Vulpe Nicolae: Global configurations of singularities for quadratic differential systems with exactly two finite singularities of total multiplicity four. (2014)