Agranovich, P. Z.; Favorov, S. Yu.; Gol’dberg, A. A.; Gurarij, V. P.; Marchenko, V. A.; Novikov, S. P.; Ostrovskij, I. V.; Pastur, L. A.; Rashkovskij, A. Yu.; Khruslov, E. Ya. Lev Isaakovich Ronkin (obituary). (English. Russian original) Zbl 0962.01010 Russ. Math. Surv. 54, No. 3, 619-621 (1999); translation from Usp. Mat. Nauk 54, No. 3, 147-148 (1999). MSC: 01A70 01A65 PDFBibTeX XMLCite \textit{P. Z. Agranovich} et al., Russ. Math. Surv. 54, No. 3, 619--621 (1999; Zbl 0962.01010); translation from Usp. Mat. Nauk 54, No. 3, 147--148 (1999) Full Text: DOI
Novikov, S. P. Levels of quasiperiodic functions on a plane, and Hamiltonian systems. (English. Russian original) Zbl 0984.37061 Russ. Math. Surv. 54, No. 5, 1031-1032 (1999); translation from Usp. Mat. Nauk 54, No. 5, 147-148 (1999). MSC: 37J05 57R70 PDFBibTeX XMLCite \textit{S. P. Novikov}, Russ. Math. Surv. 54, No. 5, 1031--1032 (1999; Zbl 0984.37061); translation from Usp. Mat. Nauk 54, No. 5, 147--148 (1999) Full Text: DOI