A. Frenkel, E. Levich, L. Stilman, “Hamiltonian description of ideal MHD revealing new invariants of motion”, Physics Letters A, 88, № 9, 1982, 461
R S Ward, “Hopf solitons on the lattice”, J. Phys. A: Math. Gen., 39, № 4, 2006, L105
Valerii I. Sanyuk, 447, Strings and Symmetries, 1995, 326
Chang-Guang Shi, Lan-Xiang Gao, Fei Shu, 2011 International Conference on Multimedia Technology, 2011, 1977
K. A. Dunn, T. A. Harriott, J. G. Williams, “Kink number in general relativity”, Journal of Mathematical Physics, 32, № 2, 1991, 476
A F Ranada, “On the magnetic helicity”, Eur. J. Phys., 13, № 2, 1992, 70
C. Adam, A. Wereszczynski, “Topological energy bounds in generalized Skyrme models”, Phys. Rev. D, 89, № 6, 2014, 065010
D H Tchrakian, “Notes on Yang–Mills–Higgs monopoles and dyons on {\bb R}^{D}, and Chern–Simons–Higgs solitons on {\bb R}^{D-2}: dimensional reduction of Chern–Pontryagin densities”, J. Phys. A: Math. Theor., 44, № 34, 2011, 343001
M.S. Shahrokhi-Dehkordi, J. Shaffaf, “On critical points of the σ2-energy over a space of measure preserving maps”, Nonlinear Analysis: Theory, Methods & Applications, 117, 2015, 65
A Mironov, A Morozov, T.N Tomaras, “Onn-point amplitudes inN= 4 SYM”, J. High Energy Phys., 2007, № 11, 2007, 021