Discuss how modular and intergrated theories of mathematical cogntion influence theories of developmental dyscalculia

i need to write a 4000 word dissertation on this topic. i need it to be a critical review and need to discuss the different ways researchers have approached and explained developmental dyscalculia. i need to discuss the cognitive deficits approach and how it explains developmental dyscalculia.
reference all references with paper title and journal title, page numbers and volumes etc