Collapsing stellar filament and exotic matter in Palatini f(R) gravity Rubab Manzoor, Abdul Jawad, Muhammad Adeel, Muhammad Saeed and Shamaila Rani Eur. Phys. J. C, 79 10 (2019) 831 Published online: 10 October 2019 DOI: 10.1140/epjc/s10052-019-7332-0