1. A monograph of the Pyrenulaceae (excluding Anthracothecium and Pyrenula) and the Requienellaceae, with notes on the Pleomassariaceae, the Trypetheliaceae and Mycomicrothelia (lichenized and non-lichenized ascomycetes);Aptroot;Bibliotheca Lichenologica,1991
2. Melanommatales (Loculoascomycetes);Barr;North American flora, series II,1990
3. Notes on Ascomycete systematics;Eriksson;Systema Ascomycetum,1992
4. Outline of the ascomycetes;Eriksson;Systema Ascomycetum,1993