“…In recent years, progress has also been made to the study of nodal solutions, i.e., solutions with a specific zero-counting property in (a, b), for nonlinear BVPs consisting of Eq. (1.1) and two-point separated BCs, see [10,11,19,21,22,23]. As regard to nonlocal BVPs, results on the existence of nodal solutions have been obtained only for the special BVP consisting of the equation 4) and the multi-point BC…”