Directoids: An Algebraic Approach To Ordered Sets
Chajda, Ivan; Langer, Helmut
Directoids: An Algebraic Approach To Ordered Sets Ivan Chajda, Helmut Langer - Lemgo Heldermann 2002
Directoids: An Algebraic Approach To Ordered Sets Ivan Chajda, Helmut Langer - Lemgo Heldermann 2002