See the death notice, publication list, and appreciations by József Szabados (analysis and approximation theory), by Pál Erdős and Mihály Szalay (number theory), and by Miklós Simonovits (graphy theory) in Matematikai Lapok25 (1974) pages 211-250 (http://real-j.mtak.hu/9373/1/MTA_MatematikaiLapok_1974.pdf); although mostly Hungarian, much of the mathematics is easily understood and many of the citations are to English articles. Retrieved 10 April 2022.