T. E. Graedel, Rachel Barr, Chelsea Chandler, Thomas Chase, Joanne Choi, Lee Christoffersen, Elizabeth Friedlander, Claire Henly, Christine Jun, Nedal T. Nassar, Daniel Schechner, Simon Warren, Man-yu Yang, Charles Zhu,
Methodology of Metal Criticality Determination Environmental Science & Technology. ,vol. 46, pp. 1063- 1070 ,(2012) ,
10.1021/ES203534Z