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Review of the elements of 2-categories. (English) Zbl 0334.18016
Category Sem., Proc., Sydney 1972/1973, Lect. Notes Math. 420, 75-103 (1974).

18D05 Double categories, \(2\)-categories, bicategories and generalizations (MSC2010)
18A40 Adjoint functors (universal constructions, reflective subcategories, Kan extensions, etc.)
18C15 Monads (= standard construction, triple or triad), algebras for monads, homology and derived functors for monads