Șubă, A. The problem of the center for cubic differential systems with two affine non-parallel invariant straight lines of total multiplicity three. "Ion Creanga" State Pedagogical University.
Chicago Style (17th ed.) CitationȘubă, Alexandru. The Problem of the Center for Cubic Differential Systems with Two Affine Non-parallel Invariant Straight Lines of Total Multiplicity Three. "Ion Creanga" State Pedagogical University.
MLA (9th ed.) CitationȘubă, Alexandru. The Problem of the Center for Cubic Differential Systems with Two Affine Non-parallel Invariant Straight Lines of Total Multiplicity Three. "Ion Creanga" State Pedagogical University.
Warning: These citations may not always be 100% accurate.