A leftover korban pesach, such as one which was lost before Pesach and found later, is brought as a korban shelamim: Zevachim 7b, 9a-b, 11a-b, 49a; Temurah 19a, 20a
If one slaughtered the korban pesach in the morning: Pesachim 61a, 108a; Zevachim 11b; Menachot 47b
If one slaughtered the korban pesach before the afternoon korban tamid: Pesachim 61a; Zevachim 12a
If one did the zerikat hadam in the morning: Pesachim 61a
If one brings the korban pesach after its proper time, does it require semichah - leaning on the animal by the bringer of the korban: Pesachim 96b, 97a; Zevachim 9a
If one brings the korban pesach after its proper time, does it require libations: Pesachim 96b, 97a; Zevachim 9a
If one brings the korban pesach after its proper time, does it require that the chest and thigh-bone be raised: Pesachim 96b, 97a; Zevachim 9a