Quillen 1967 'Homotopical Algebra': abstract framework for homotopy-theory. Weak-equivalence + fibration + cofibration triples. Localisation + derived-functor. Foundation of modern abstract homotopy.
Quillen 1967 'Homotopical Algebra': abstract framework for homotopy-theory. Weak-equivalence + fibration + cofibration triples. Localisation + derived-functor. Foundation of modern abstract homotopy.