Nigam, B. ., P. . Ahirwal, . S. . Salve, and S. . Vamney. “Document Classification Using Expectation Maximization With Semi Supervised Learning”. Scholars Journal of Science and Technology, vol. 2, no. 4, Aug. 2021, pp. 386-97, doi:10.53075/Ijmsirq/145756854374585.