Ramachandran, S., A. Gera, R. Gera, S. Kataria, and M. P. Roy. “Accuracy of Pulse Oximetry Versus Arterial Blood Gas in Screening Cyanotic Heart”. International Journal of Contemporary Pediatrics, vol. 3, no. 3, Dec. 2016, pp. 983-7, doi:10.18203/2349-3291.ijcp20162377.