Idris, Humaira Lorentzian Wormholes in Minimally and Non-minimally Coupled f (R) Modified Gravity Humaira Idris - Islamabad: SNS - NUST, 2015. - xii, 58 p. : ill. ; 30cm. Hard Cover Subjects--Topical Terms: Mathematics - M. Phil Thesis Dewey Class. No.: 510