The influence of the second harmonic in the current-phase relation on the voltage-current characteristic of high TC DC SQUIDYa. S. Greenberg, I. L. Novikov, V. Schultze and H.-G. MeyerEur. Phys. J. B, 44 1 (2005) 57-62DOI: https://doi.org/10.1140/epjb/e2005-00099-1