Suwal, R., and P. Rajbhandari. “Effect of Change in Geometry on Time Period of Lattice Parabolic Shells Using SAP2000 OAPI”. Journal of the Institute of Engineering, vol. 17, no. 1, Apr. 2023, pp. 22-30, https://tuta.pcampus.edu.np/journal/index.php/jie/article/view/17-01-04.