“Generalized QR (GQR)- Lightlike Submanifolds of Indefinite Quaternion Kähler Manifolds” (2021) Journal of International Academy of Physical Sciences, 25(4), pp. 475–494. Available at: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/894 (Accessed: 23 October 2026).