Xavier Caicedo2026-03-222026-03-22199510.1007/bf01204787https://doi.org/10.1007/bf01204787https://andeanlibrary.org/handle/123456789/48416Citaciones: 17enMathematicsBipartite graphClass (philosophy)French hornCombinatoricsDiscrete mathematicsPure mathematicsFinitely axiomatizable quasivarieties of graphsarticle