Scolnic, D., Casertano, S., Riess, A., Rest, A., Schlafly, E., Foley, R.J., Finkbeiner, D., Tang, C., Burgett, W.S., Chambers, K.C., Draper, P.W., Flewelling, H., Hodapp, K.W., Huber, M.E., Kaiser, N., Kudritzki, R.P., Magnier, E.A., Metcalfe, N., Stubbs, C.W., "Supercal: Cross-calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae", Astrophysical Journal, 2015