M. F. Z. . Raja Yahya and A. N. . Shahidan, “Influence of Fresh and Thermoxidized Carotino Oil on Cyclic Guanosine Monophosphate (cGMP) in Erythrocytes from Sprague Dawley Rats”, SRJ, vol. 9, no. 1, pp. 63–74, Jun. 2012.