Ablikim, M.(2004). Direct measurements of the branching fractions for D0→K−e+νeD0→K−e+νe and D0→π−e+νeD0→π−e+νe and determinations of the form factors f+K(0) and f+π(0). Physics Letters B, 597(1), 39-46. doi:10.1016/s0370-2693(04)01012-3

Ablikim, M. "Direct Measurements of the Branching Fractions for D0→K−e+νeD0→K−e+νe and D0→π−e+νeD0→π−e+νe and Determinations of the Form Factors F+K(0) and F+π(0)". Physics Letters B, 597.1 ( 2004 ): 39-46.