[2] Filippov A. F.:
Kratkoe dokazatel'stvo teorémy o privedenii matricy k žordanovoj formě. Vestnik Moskov. Univ. 1971, N° 2, 18-19 (A short proof of the theorem on the reduction of a matrix to Jordán form, Moscow Univ. Math. Bull. 26(1971), 70-71)
MR 0279113