Studies on eigenvalue analysis for a class of differential equations by the methods of weighted residuals / Humaira Farzana. [PhD Thesis] Farzana, Humaira 515.35 FAS Thesis (PhD)--Department of Applied Mathematics, University of Dhaka, Session: 2011-2012. Includes bibliographical references. Dhaka : University of Dhaka, 2018. 2018. 2018 Text xiv, 229 p. : eng