Studies of the vibrational energy level of H2O by algebraic and DFT approaches - S. R. Karumuri; V. U.M. Rao; M. S. Surendrababu; T. B. Patrudu; N. Vamsikrishna; K.S. Babu; V. S.S. Kumar; G. Srinivas (Ukrainian Journal of Physics, 2013)