1
Published: 2008-
2
Published: 1998
Superior document: Resümees der Vorträge ... Treffen ... in ... 7
3
Published: anfangs;, später;, 1992-1998
4
Published: 2001
Superior document: Treffen 10
5
Published: 2000
Superior document: Treffen 9
6
Published: 1999-
7
Published: 1996
Superior document: Resümees der Vorträge ... Treffen ... in ... 5
8
Published: 2015
Superior document: Fines transire 24