S. Peter, A. Balakrishnan, V. A. Potdar, M. S. Chadha, and S. M. Jadhav, “An outbreak of influenza A(H3N2) in Alappuzha district, Kerala, India, in 2011”, J Infect Dev Ctries, vol. 9, no. 04, pp. 362–367, Apr. 2015.