Prashant Upadhyaya, Sheetal Upadhyaya, Omar Farooq, Paras Chawla. “Hindi Digit Recognition Using KALDI ASR Toolkit”. International Journal of Advanced Science and Technology, Vol. 29, no. 10s, May 2020, pp. 2127-31, http://sersc.org/journals/index.php/IJAST/article/view/16823.