https://www.hadith.net/ Dar al-Hadith Institue http://https:/www.hadith.net/post/28108/zaydis-and-imamis-written-sources Styles of Compilation http://https:/www.hadith.net/post/28086/al-usul-al-arba-mia Styles of Compilation http://https:/www.hadith.net/post/27897/a-survey-of-compiling-gharib-al-hadith-books Styles of Compilation http://https:/www.hadith.net/post/27854/writers-of-hadith-collections-before-kulayni Styles of Compilation