Yerra, Pavan Kumar Studies on efficiency of black hole heat engines / by Pavan Kumar Yerra - Bhubaneswar : IIT Bhubaneswar, 2019. - 151 p. : illustrations (some col.) ; 29cm. Includes bibliographical references. Subjects--Topical Terms: Astronomy--Black Hole Dewey Class. No.: 523.112 / YER/S