A Group of Professors. (1386 AH). Legal Discourses. Tehran: The Institute for the Compilation and Publication of the Works of Imam Khomeini (RA), The Institute for the Printing and Publishing of the Ascension.
Al-Sheikh Razi, Mohammad Tahir. (1426 AH). Bidayah al-wosoul fi shrah kifayah al-Usool. (Musavi Beka, research, 9 volumes). Qom: Dar Al Hadi. (in Arabic).
Araki, Mohammad. (2008). Principles of modern jurisprudence. Qom: Jamal al-Fikr al-Islami.
Ayji, Abd al-Rahman bin Ahmad. (1421 AH). Sharh al-Azod, ala Mukhtasar Al-Muntahi al-Usooli (with the efforts of F. A. Nasif and T. Yahya; based on the compilation of A. Ibn Omar Ibn Hajib,
Vol. 1). Beirut: Dar Al-Kutb Al-Ilmiyah. (in Arabic).
Esfahani, Mahmoud bin Abdul Rahman. (1406 AH). Bayan al-Mukhtasar (Research by M. M. Baqa; based on the compilation of A. Ibn Umar Ibn Hajib, Vol. 3). Arabia: Dar al-Madani. (in Arabic).
Esfahani, Mohammad Hossein. (1429 AH). Nehayah al-Deraiya fi Sharh al-Kafayah (6 volumes). Qom: Al-Al-Bayt (peace be upon him) Foundation for Revival of Heritage. (in Arabic).
Fazel Movahedi Lankarani, M. (1381). Principles of Shiite Jurisprudence (M. and S. Maleki Isfahani, commentary, 10 volumes). Qom: Markaz. (in Persian).
Fazel Movahedi Lankarani, Muhammad. (1377). A complete guide to the principles of jurisprudence (M. Dadistan, compiler, 16 volumes). Qom: Faiziyah. (in Persian).
Hurr Ameli, Muhammad ibn Hassan. (1413 AH). Wasael al- Shi’a ela tehsil masael al-shariah. (A. Rabbani Shirazi, Correction and Research, vol. 18). Beirut: Dar Ihya’at Al-Turaht Al-Arab. (in Arabic).
Iki, Muhammad ibn Abi Bakr. (1438 AH). Meeraj al-wosoul fi sharh menhaj al-Usool lel-baydawi. (Research by H. ibn Abdullah Jubeir and M. Gha. Faqih; Based on the work of A. ibn Omar Al-Baydawi, vol. 1). Beirut: Dar Al-Basha’ir Al-Islamiyah. (in Arabic).
Jannati, Muhammad Ibrahim. (1386 AH). The Development of Ijtihad in the Field of Inference (2 vols.). Tehran: Amir Kabir.
Keefe, R. (2000). Theories of vagueness. Cambridge: Cambridge University Press.
Kennedy, C. (2007). “Vagueness and grammar: The semantics of relative and absolute gradable adjectives”. Linguistics and Philosophy, 30(1), 1–45.
Khoi, Abulqasem. (1419 AH). Derasat fi elm al-uosool. (Ali Hashemi Shahroudi, professor). Qom: Islamic Jurisprudence Department Foundation. (in Arabic).
Khoi, Abulqasem. (1422 AH). Mesbah al-Usool. (Mohammed Sarwar Waez al-Hussaini, appointed). Qom: Davari bookstore. (in Arabic).
Khomeini, Ruhollah (1420 AH). Motamed al-Usool (M. F. Lankarani, translation, 2 volumes). Tehran: Imam Khomeini (PBUH) Editing and Publishing Institute. (in Arabic).
Kulani, Muhammad ibn Yaqub. (1407 AH). Al-Usool min al-Kafi (vol. 1). Tehran: Dar al-Kutub al-Islamiyyah. (in Arabic).
Makarem Shirazi, Nasser. (1427 AH). Istifta'at (second edition, 3 volumes; edited by Abul-Qasim Alian-Nejadi). Qom: Madrasa al-Imam Ali ibn Abi Talib (AS). (in Arabic).
Motahari, Morteza. (1380 AH). Islam and the needs of the time (20th edition). Tehran: Sadra. (in Persian).
Noormafidi, Mojtaba. (1393 AH). The apparent ruling of acceptance or rejection. Qom: Jurisprudential Center of the Pure Imams (AS). (in Persian).
Sadr, Mohammad Bagher. (1417 AH). Bohous fi elm al-usool. (Mahmoud Hashemi Shahroudi, the author; 3rd edition). Qom: Islamic Jurisprudence Education Center. (in Arabic).
Sadr, Muhammad Baqir. (2007). Alhalghah al-thalethah fi Osloubha al-thani (B. Irwani, commentary, 2 volumes). Qom: Muhabbin Publishing House. (in Arabic).
Shahid Aval, Muhammad bin Makki. (1430 AH). Maosoueh al-shahid al-aval. (19 volumes; by the efforts of Reza Mokhtari, Ali Avtaz Natghi and the group of Man al-Muhaqqeen, in cooperation with the Islamic Propaganda Office of the Qom Seminary, the Research Institute of Islamic Sciences and Culture, the Center for the Revival of Islamic Works). Qom: School of Islamic Media in Al-Hawza Al-Alamiya, Research Assistant, Islamic Science and Culture Center. (in Arabic).
Sobhani Tabrizi, Jafar. (1398). A clear commentary on the book Al-Wasit in the Principles of Jurisprudence (Ali Reza Sobhani, translation, 2 volumes). Qom: Tawhid Publishing House. (in Persian).
Sorensen, R. (2001). Vagueness and contradiction. Oxford: Oxford University Press.
Tofi, Sulayman bin Abdul Qawi. (1407). Sharh Mukhtasar Al-Rawdha (research by A. bin Abdul Mohsen Turki; based on the work of A. bin Ahmad ibn Qudamah). Beirut: Al-Risalah Publishing House. First edition, 3 volumes. (in Arabic).
Williamson, T. (1994). Vagueness. London: Routledge.