1. Adâmek, J., Theory of Mathematical Structures, Reidel 1983.
2. Adâmek, J., Classification of concrete categories, Houston J. Math. 12 (1986), 305–326.
3. Adâmek, J. and Herrlich, H., Cartesian closed categories, quasitopoi and topological universes, Comment. Math. Univ. Carolinae
27 (1986), 235–257.
4. Adâmek, J., Herrlich, H. and Strecker, G.E., Least and largest initial completions, Comment. Math. Univ. Carolinae
20 (1979), 43–77.
5. Adâmek, J., Herrlich, H. and Strecker, G.E., The structure of initial completions, Cahiers Top. Géom. Diff. Categ. 20 (1979), 333–352.