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Its theological basis is primarily that of the "Bhagavad Gita" and "Bhagavata Purana" (known within the tradition as the "Srimad Bhagavatam"), as interpreted by early followers of Chaitanya, such as Sanatana Goswami, Rupa Goswami, Jiva Goswami, Gopala Bhatta Goswami and others.