Coba ceritain soal Lazar Lyusternik

Lazar Aronovich Lyusternik (juga Lusternik, Lusternick, Ljusternik; ; ) adalah seorang matematikawan asal Soviet. Ia dikenal atas karyanya dalam topologi dan geometri diferensial, dimana ia menerapkan prinsip variasional.

Pavel Aleksandrov et al., LAZAR' ARONOVICH LYUSTERNIK (on the occasion of his 60th birthday), Russ. Math. Surv. 15 (1960), 153-168.

Pavel Aleksandrov, In memory of Lazar Aronovich Lyusternik,  Russ. Math. Surv. 37 (1982), 145-147