Jalal, Samir, B. Sutradhar, Kalyan Sahu, Parthasarathi Mukhopadhyay, and Subal Biswas. 2015. “Search Engines and Alternative Data Sources in Webometric Research: An Exploratory Study”. DESIDOC Journal of Library & Information Technology 35 (6). https://doi.org/10.14429/djlit.35.6.8883.