Rao, Y., S. Vidyasagar, and L. Bairy K. “A 45-DAY RANDOMIZED, OPEN-LABEL, COMPARATOR STUDY TO EVALUATE THE SAFETY AND EFFICACY OF ZINCOVIT TABLETS WITH GRAPE SEED EXTRACT (NUTRITIONAL FOOD SUPPLEMENT) IN PATIENTS WITH TYPE 2 DIABETES MELLITUS”. Asian Journal of Pharmaceutical and Clinical Research, Vol. 9, no. 2, Mar. 2016, pp. 220-2, https://innovareacademics.in/journals/index.php/ajpcr/article/view/10436.