Reference for Ketubot 201:16

תנ"ה נשים שאמרו חכמים אין להן כתובה כגון הממאנת וחברותיה אין להן מנה מאתים אבל תוספת יש להן

It was also taught in a baraita: The women concerning whom the Sages have ruled, they do not receive a ketubah, for instance, a minor who exercised her right of refusal and the others listed in the same context, are not entitled to the maneh or to the two hundred zuz, but they are entitled to the additional amount;

Jastrow