1. Ostiolate and non-ostiolate Pyrenomycetes;Arx von;Proceedings of the Koninklijke Nederlandse Akdemie van Wetenschappen, Amsterdam, Series C,1973
2. On Thielavia and some similar genera of ascomycetes;Arx von;Studies in Mycology,1975
3. The Genera of Fungi Sporulating in Pure Culture;Arx von,1981
4. A key to the species of Gelasinospora;Arx von;Persoonia,1982
5. Asordaria, a new genus of the Sordariaceae, and a new species of Melancarpous;Arx von;Persoonia,1987