Kokarev, G.; Kuksin, S. Quasilinear elliptic differential equations for mappings between manifolds. I. (English. Russian original) Zbl 1229.58019 St. Petersbg. Math. J. 15, No. 4, 469-505 (2004); translation from Algebra Anal. 15, No. 4, 1-60 (2003). MSC: 58J05 35J62 53D45 PDFBibTeX XMLCite \textit{G. Kokarev} and \textit{S. Kuksin}, St. Petersbg. Math. J. 15, No. 4, 469--505 (2004; Zbl 1229.58019); translation from Algebra Anal. 15, No. 4, 1--60 (2003) Full Text: DOI
Bikbaev, R. F.; Kuksin, S. B. A periodic boundary value problem for the sine-Gordon equation, small Hamiltonian perturbations of it, and KAM-deformations of finite-gap tori. (English. Russian original) Zbl 0791.35118 St. Petersbg. Math. J. 4, No. 3, 439-468 (1993); translation from Algebra Anal. 4, No. 3, 42-78 (1992). MSC: 35Q53 37J99 35B35 PDFBibTeX XMLCite \textit{R. F. Bikbaev} and \textit{S. B. Kuksin}, St. Petersbg. Math. J. 4, No. 3, 439--468 (1992; Zbl 0791.35118); translation from Algebra Anal. 4, No. 3, 42--78 (1992)