Power of Chalitzah for a Female Minor: Yevamot 110b, 111b, 112b
Whether Chalitzah of a Female Minor frees her co-wife, who is also a Female Minor, where they were both married off by their fathers: Yevamot 110a
Please note that "Chalitzah" refers to the rite which frees a man and woman from their obligation to perform levirate marriage.
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