M. Prabavathy, R. Sivaranjani, N. Alex. “Learning Basic Mathematics Among Children With Intellectual Disabilities about Place Value Concept Using Virtual Base Ten Blocks”. Journal for ReAttach Therapy and Developmental Diversities, vol. 6, no. 9s(2), Sept. 2023, pp. 964-70, https://jrtdd.com/index.php/journal/article/view/1535.