Reference for Bekhorot 84:39

ומאן תנא אליבא דר"ע

The point at issue will therefore be [as follows]: According to the [Tanna of the Baraitha] who holds that a tumtum submits to halizah, that his wife must be released by halizah and his brother may marry his wife, we do not maintain that since the status has been changed,<span class="x" onmousemove="('comment',' The deceased brother becoming a tumtum.');">²⁷</span>

Jastrow

Jastrow