Exponential objects in the construct 𝑃𝑅𝐴𝑃 E. Lowen; R. Lowen; C. Verbeeck — 1997 Cahiers de Topologie et Géométrie Différentielle Catégoriques
Local compactness in approach spaces. II. Lowen, R.; Verbeeck, C. — 2003 International Journal of Mathematics and Mathematical Sciences
Local compactness in approach spaces. I. Lowen, R.; Verbeeck, C. — 1998 International Journal of Mathematics and Mathematical Sciences