  Electrical characteristics are measured in submicron YBaCuO-normal metal
point contacts with a direct conductivity. In a microwave field, such contacts
reveal a nonstationary Josephson effect which can occur in the current
concentration region not only in the initial weak bonds in YBaCuO but also the
weak bonds of a phase-slip center type, formed as a result of a significant
current injection (as well as a microwave field). The existence of internal
weak bonds in the HTS-electrode contact area produces a narrow minimum in the
differential resistance near zero biases. Moreover, the effect of magnetic flux
quantization is observed for separate granules in magnetic fields stronger than
the first critical field.
