https://es.wikipedia.org/wiki/Isaac_Alfasi
Isaac Alfasi - Wikipedia, la enciclopedia libre
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https://www.myjewishlearning.com/article/rabbi-isaac-alfasi-rif/
Rabbi Isaac Alfasi: Rif | My Jewish Learning
Jan 3, 2018 - Rabbi Isaac Alfasi, Rif. Early Medieval Halakhic Texts. Halakhic Texts in Middle Ages. Sources on Jewish Law. Jewish Texts
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https://jewishvirtuallibrary.org/jsource/biography/Alfasi.html
Rabbi Isaac Alfasi | Jewish Virtual Library
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https://www.jewishencyclopedia.com/articles/1192-alfasi-isaac-ben-joseph
ALFASI, ISAAC BEN JOSEPH - JewishEncyclopedia.com
Complete contents the 1906 Jewish Encyclopedia.
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https://www.jewishencyclopedia.com/articles/12754-rif
ALFASI, ISAAC BEN JACOB - JewishEncyclopedia.com
Complete contents the 1906 Jewish Encyclopedia.
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https://jewishencyclopedia.com/articles/12754-rif
ALFASI, ISAAC BEN JACOB - JewishEncyclopedia.com
Complete contents the 1906 Jewish Encyclopedia.
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