ASSESSİNG THE IMPACT OF COVİD-19(SARS-COV-2) PANDEMİC ON PUBLİC TRANSPORTATİON: ANALYSİS BASED ON ANKARA AND MERSİN PROVİNCES. Third Sector Social Economic Review, v. 56, n. 4, p. 2379–2400, 25 Dec.2021.