From 1965 he wrote articles criticizing the Oeser edition of Carmen, listing many mistakes, describing it as "a musicological disaster of the first magnitude", and continued to point out its errors in reviews of subsequent performances and recordings.
From 1965, he composed articles condemning the Oeser production of Carmen, highlighting numerous errors, labeling it as "a monumental failure in musicology." He further elaborated on these points in his evaluations of subsequent performances and recordings.