Universal partial order represented by means of oriented trees and other simple graphs

Universal relational systems

Bjàrni Jónsson · MATHEMATICA SCANDINAVICA · 1956 · 185 citations · Full text

Duality Theorems for Finite Structures (Characterising Gaps and Good Characterisations)

Jaroslav Nešetřil, Claude Tardif · Journal of Combinatorial Theory Series B · 2000 · 121 citations

Natural Sciences, Computer Science, Mathematics +11

Duality and Polynomial Testing of Tree Homomorphisms

Pavol Hell, Jaroslav Nešetřil, Xuding Zhu · Transactions of the American Mathematical Society · 1996 · 102 citations · Full text

Natural Sciences, Plant Sciences, Color Theory +6

Homomorphisms of graphs into odd cycles

A.M.H. Gerards · Journal of Graph Theory · 1988 · 28 citations

Computing, Biology, Cell Cycle +13

On universal partly ordered sets and classes

Zdeněk Hedrlín · Journal of Algebra · 1969 · 26 citations

Natural Sciences, Mathematics, Discrete Mathematics +9