HYUN PARK, SANG, HUI JEONG GWON, and SEUNG HO JANG. 2010. “Microwave-Assisted Rapid Synthesis of 166Ho-1,4,7,10-Tetraazacyclododecane-N,N’,N’’,N’’’- Tetraacetic Acid:A Bifunctional Chelating Agent for Radiopharmaceuticals”. Asian Journal of Chemistry 19 (1):391-95. https://asianpubs.org/index.php/ajchem/article/view/20451.