Mark Grigorievich Krein (1907-1989)

• Mark Grigorievich Krein at MacTutor.

• Mark Krein at Wikipedia.

• Mark Grigorievich Krein at the Mathematics Genealogy Project.

• Mark Grigor'evich Krein at MathSciNet (for those with access).

• Nudel'man, A. A., On M. G. Krein's contribution to the moment problem, Ukrainian Math. J. 46 (1994), 62-74.

• Osilenker, B. P., M. G. Krein's ideas in the theory of orthogonal polynomials, Ukrainian Math. J. 46 (1994), 75-86.

• Akhiezer, N. I., Yu. M. Berezanskii, I. S. Iokhvidov, Yu. A. Mitropol'skii and V. P. Potanov, Mark Grigor'evich Krein (on his 60th birthday), Ukrainian Math. J. 19 (1967), 601-605.

• Berezanskii, Yu. M., B. Ya. Levin, V. A. Marchenko, Yu. A. Mitropol'skii and I. V. Ostrovskii, Mark Grigor'evich Krein, Ukrainian Math. J. 42 (1990), 511.

• Gohberg, I., Mark Grigorievich Krein, 1907-1989, Notices Amer. Math. Soc. 37 (1990), 284-285.

• Mitropol'skii, Yu. A., Mark Grigor'evich Krein, Ukrainian Math. J. 46 (1994), 1–2.