1. On the categorical shape of a functor;Deleanu;Fund. Math.,1977
2. Relations between reflective subcategories and shape theory;Giuli;Glasnik Matematicki,1981
3. E. Giuli and A. Tozzi, On epidense subcategories of topological categories, Questiones Mathematicae, to appear.
4. E. Giuli, G.E. Strecker and A. Tozzi, On E-dense hulls and Shape Theory, Proc. Fifth Prague Topological Symposium, to appear.
5. Categorical topology;Herrlich;Gen. Topology Appl.,1971