Bandhopadhyay, A., I. Chaterjee, and S. Dey. “A Comparative Study of Phonetogram Parameters Among Female Trained Hindustani Classical Singers, Untrained Singers and Non-Singers”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 5, no. 6, Oct. 2019, pp. 1527-32, doi:10.18203/issn.2454-5929.ijohns20194922.