Clowe, D., Markevitch, M., Bradac, M., Gonzalez, A., Chung, S., Massey, R., & Zaritsky, D. (2012). On dark peaks and missing mass : a weak-lensing mass reconstruction of the merging cluster system A520. Astrophysical Journal, 758(2), Article 128. https://doi.org/10.1088/0004-637x/758/2/128