Khan, Humayun. A proposed of Real-time photoplethysmography by optical sensor using digital lock-in detection powered by solar system / Humayun Khan, Farrukh Baig and Tanver Aftab. - MUET, Jamshoro : Biomedical Engineering, 2014. - xi, 61p. : ill. ; 30 cm. Includes references Subjects--Topical Terms: Biomedical Engineering Dewey Class. No.: / KHA