Besides the above Quranic verses, there some authenticated references for this issue. For example, Ali Ibn Burhanu'd-din Halabi Shafi'i writes in his Siratu'l-Halabiyya, p. 39 that at first Fatimah complained to Abu Bakr about the fact that she was given the fadak as a gift by the prophet of Islam, as the witnesses were unavailable she was forced to allege her right based on the inheritance law. Also it is mentioned in Mu'jam Al-Buldan of Yaqut al-Hamawi, Tafsir al-Kabir of Imam Fakhru'd-din Razi, Sawa'iq al-Muhriqa of Ibn Hajar p. 21, Sharh al-Nahju'l-Balagha of Ibn Abi'l-Hadid Mu'tazali Vol 4, p. 80 that Fatima firstly claimed she was given the fadak as a gift but they rejected her witnesses and she suffered and angrily said that she would not talk to Abu Bakr and Umar again.