Coreflective subcategories in general topology Horst Herrlich; G. Strecker — 1972 Fundamenta Mathematicae
Direct limits of Hausdorff spaces Hajek, D. W.; Strecker, G. E. — 1972 General Topology and its Relations to Modern Analysis and Algebra
Compactness as an operator J. de Groot; H. Herrlich; G. E. Strecker; E. Wattel — 1969 Compositio Mathematica
The structure of initial completions J. Adámek; H. Herrlich; G. E. Strecker — 1979 Cahiers de Topologie et Géométrie Différentielle Catégoriques
An approach to a dual of regular closure operators C. Castellini; J. Koslowski; G. E. Strecker — 1994 Cahiers de Topologie et Géométrie Différentielle Catégoriques