2 citations to https://www.mathnet.ru/rus/zvmmf1955

1. Kamalvand M.G., Ikramov Kh.D., “The dimension of the variety of conjugate-normal matrices”, Doklady Mathematics, 78:3 (2008), 910–912            
2. Friedland S., “Normal matrices and the completion problem”, SIAM J Matrix Anal Appl, 23:3 (2002), 896–902