Volume 21 Issue 1, 1–137
Volume 20 Issue 2+3, 63–634 Issue 1, 1–61
Volume 19 Issue 4, 137–181 Issue 3, 95–135 Issue 2, 47–94 Issue 1, 1–46
Volume 17 Issue 3, 189–249 Issue 2, 77–188 Issue 1, 1-75
[12] Originally published in Nachr. Österr. Math. Ges. 21/22 (1952) = Bericht über den III. Österreichischen Mathematikerkongress, Salzburg, 9.– 14. IX. 1952, p. 51. Reused with permission.
© Copyright 2018 Mathematical Sciences Publishers. All rights reserved.