Analyze the theoretical underpinnings of intertextuality as proposed by Julia Kristeva, drawing upon Mikhail Bakhtin's concept of dialogism. Define a text not as a closed entity but as a permutation of other texts. In your response, explain how the writer's 'subjectivity' is merely a tissue of quotations drawn from the innumerable centers of culture. Provide a theoretical framework for how meaning is generated through the intersection of multiple textual surfaces rather than a single authorial source.