Collins, Brittany C., Ryan Sapp, John LaManca, Christopher Wolff, Edwin Miranda, Vincent Gutierrez, and Scott A. Mazzetti. 2013. “Influence of Xpand Nitric Oxide Reactor, L-Arginine Alpha-Ketoglutarate, and Caffeine Supplementation on Calf Muscle Re-Oxygenation During and After Acute Resistance Exercise”. Journal of Nutritional Therapeutics 1 (2):138-44. https://doi.org/10.6000/1929-5634.2012.01.02.5.