Whether the chatat nazir comes to attain forgiveness, or for another purpose: Nedarim 4b; Keritot 26a; Zevachim 8a; Rashi Keritot 8b "Arbaah"
Is the chatat nazir considered a "voluntary offering": Temurah 14b
May one deduce laws from a general chatat to a chatat nazir, and vice versa: Zevachim 8a
Bringing such an offering on an altar outside the Temple: Temurah 14b
Considering a Nazirite to be mechusar kapparah until he brings his completion offerings, and specifically his chatat offering: Keritot 8b
Does one bring this offering if he wasn't sure whether he was a nazir, then Yom Kippur passed, and then he found out he had been a nazir: Keritot 26a
What if one processes a korban chatat for sin, while having in mind it should be a chatat nazir or chatat metzora: Zevachim 9b