Aquatic Oligochaete Biology VIII: Proceedings of the 8th International Symposium on Aquati Oligochaeta, Held in Bilbao, Spain, 18-22 July 2000 (Paperback, 2001)
Aquatic Oligochaete Biology IX: Selected Papers from the 9th Symposium on Aquatic Oligochaeta, 6-10 October 2003, Wageningen, the Netherlands (Hardcover)
Aquatic Oligochaete Biology IX: Selected Papers from the 9th Symposium on Aquatic Oligochaeta, 6-10 October 2003, Wageningen, the Netherlands (Paperback, 2006)