Saraswati Sonkale, and Mrs. V.L.Kolhe. “Fine Grained Knowledge Sharing Mechanism With Hierarchical Structure Using Iterative D-IHMM”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 4, no. 7, July 2017, pp. 366-71, https://www.ijaerd.org/index.php/IJAERD/article/view/3196.