Business & information systems engineering Volume 66 Issue 2 Issue 1 Volume 65 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 64 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 63 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 62 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 61 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 60 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 59 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 58 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 57 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 6 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 5 Issue suppl Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 4 Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 3 Issue suppl Issue 6 Issue 4 Issue 3 Issue 2 Issue 1 Volume 2 Issue suppl Issue 6 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1 Volume 1 Issue 5 Issue 4 Issue 3 Issue 2 Issue 1