Onm-separated projection spaces. - Eraldo Giuli (Appl. Categorical Struct., 1994)

Direct Reflections. - Guillaume C. L. Brümmer; Eraldo Giuli; David B. Holgate (Appl. Categorical Struct., 2000)

Openness with Respect to a Closure Operator. - Eraldo Giuli; Walter Tholen (Appl. Categorical Struct., 2000)

Closure Operators with Respect to a Functor. - Gabriele Castellini; Eraldo Giuli (Appl. Categorical Struct., 2001)

What is a Quotient Map with Respect to a Closure Operator? - Maria Manuel Clementino; Eraldo Giuli; Walter Tholen (Appl. Categorical Struct., 2001)

U-Closure Operators and Compactness. - Gabriele Castellini; Eraldo Giuli (Appl. Categorical Struct., 2005)

A Topologist's View of Chu Spaces. - Eraldo Giuli; Walter Tholen (Appl. Categorical Struct., 2007)

The Fundamental Group as the Structure of a Dually Affine Space. - Eraldo Giuli; Walter Tholen (Appl. Categorical Struct., 2016)