Linking the laws of the metzora's bird offerings with the laws of the eglah arufah and the scapegoat, because all of these are brought outside the Beit haMikdash: Keritot 25a
If the scapegoat becomes blemished, and is exchanged for a blemished animal: Temurah 6b-7a
Bringing of the goat before the Temple Era: Yoma 67b
Cases requiring a replacement goat: Yoma 63b
In cases requiring sanctification of a second set of goats, we use the usable animals from the first set, first: Yoma 62a, 64a
If the other Goat dies: Yoma 62a, 63b, 65a; Temurah 22a, 23a; Keritot 28a
If the Goat was under-age: Yoma 63b
If the Goat dies before its Mitzvah is performed: Yoma 62a, 63b, 65a; Zevachim 34b; Temurah 6b
Applying the principle of dichuy if the scapegoat or Sa'ir LaShem dies before it can be used: Yoma 62a, 63b, 65a; Zevachim 34b; Temurah 22a, 23a; Keritot 28a