Dr. Pulgurthi Ramgopal and Dr.Shobana Ghanta, “STUDY OF HOMOCYSTEINE LEVELS IN DIABETIC PATIENTS WITH AND WITHOUT RETINOPATHY”, J Popl Ther Clin Pharmacol, vol. 25, no. 2, pp. 201–205, Dec. 2018, doi: 10.53555/qxpv3a90.