معادلة سورة الكافرون بربع القرآن الميمون ، تأليف يوسف شبير أحمد البريطاني
This Arabic treatise critically examines the narrations which suggest that Surah al-Kafirun is equivalent to one quarter of the Quran. The mutiple chains of the narration and the meaning of the narration is discussed in detail.
To read or download, click on the following link: Is Surah al-Kafirun equivalent to one quarter of the Quran (Arabic)
To read an English summary of the treatise, click here: Is Surah al-Kafirun equivalent to one quarter of the Quran (English)