https://torontodawah.com/regarding-what-occurred-this-year-if-one-did-not-know-of-the-crescent-of-ramadaan-being-affirmed-except-in-the-daytime-what-is-upon-him-imaam-abu-haneefah-imaam-malik-imaam-shafi-imaam-ahmad-bi/
Regarding What Occurred This Year: If One Did Not Know Of The Crescent Of Ramadaan Being Affirmed Except In The Daytime, What is Upon Him - Imaam Abu Haneefah, Imaam Malik, Imaam Shafi, Imaam Ahmad Bin Hanbal, And Shaykh Al-Islaam Ibn Taymiyyah