Reference for Ketubot 146:4
כתובה הוא דלא בעיא הא גיטא בעיא ומאי שנא כתובה דלא בעיא דאמר אי אפשי באשה נדרנית אי הכי גט נמי לא תיבעי
it is only her ketubah that she cannot claim but it is necessary for her to receive a get. But what is different about the ketubah that she does not receive it? Because, he could say, “I do not want a wife that is in the habit of making vows.” But if that is the case there should be no need for her to receive a get either!
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