  In this work, we present the results of precise measurements of the
resistivity of YNi$_2$B$_2$C single crystals with $T_{\rm c}$ = 15.5 K as a
function of the temperature, and analyze the experimental data in the framework
of the Bloch-Gr\"{u}neisen theory and electron-phonon coupling. The transport
electron-phonon spectral function that best fits the resistivity data is then
inserted in the real-axis Eliashberg equations, which are directly solved to
determine the normalized tunneling conductance both in s- and d-wave symmetry.
