Subodh Kumar Rana, Ruchi Goel, Ruchi Goel, and S. C. Agrawal. “On the Shear Flow Instability in the β-Plane”. Journal of International Academy of Physical Sciences, vol. 13, no. 1, Mar. 2009, pp. 63-72, https://www.iaps.org.in/journal/index.php/journaliaps/article/view/155.