1. Matthews SG: Partial Metric Topology. In Papers on General Topology and Applications, Eighth Summer Conference at Queens College, Annals New York Acad Sci Edited by: Susan J. Andima, Gerald Itzkowitz, T. Yung Kong. 1994, 183–197.
2. Kopperman RD, Matthews SG, Pajoohesh H: What do partial metrics represent? In Spatial Representation: Discrete vs. Continuous Computational Models, Dagstuhl Seminar Proceedings Edited by: Kopperman, R, Smyth, MB, Spreen, D, Webster, J. 2005, 1–4.
3. Künzi HPA, Pajoohesh H, Schellekens MP: Partial quasi-metrics. Theor Comput Sci 2006, 365(3):237–246. 10.1016/j.tcs.2006.07.050
4. Romaguera S, Schellekens M: Duality and quasi-normability for complexity spaces. Appl General Topol 2002, 3: 91–112.
5. Schellekens MP: A characterization of partial metrizability: domains are quantifiable. Theor Comput Sci 2002, 3: 91–112.