REVISTA MEXICANA DE FISICA E Volume 65 Issue 1 Volume 64 Issue 2 Issue 1 Volume 63 Issue 2 Issue 1 Volume 62 Issue 2 Volume 61 Issue 2 Issue 1 Volume 60 Issue 2 Issue 1 Volume 59 Issue 2 Issue 1 Volume 58 Issue 2 Issue 1 Volume 57 Issue 2 Issue 1 Volume 56 Issue 2 Issue 1 Volume 55 Issue 2 Issue 1 Volume 54 Issue 2 Issue 1 Volume 53 Issue 2