Kopperman, Ralph (ed.) et al., Papers on general topology and related category theory and topological algebra. Proceedings of the 2nd and 3rd conferences on limits, New York, NY, USA, July 2–3, 1985 and June 12–13, 1987. New York, NY: New York Academy of Sciences. Ann. N. Y. Acad. Sci. 552, 109-123 (1989).