Generic warped product submanifolds in nearly Kähler manifolds. Khan, Viqar Azam; Khan, Khalid Ali — 2009 Beiträge zur Algebra und Geometrie
Warped product submanifolds of cosymplectic manifolds. Khan, Khalid Ali; Khan, Viqair Azam; Siraj-Uddin — 2008 Balkan Journal of Geometry and its Applications (BJGA)