@article{SM_1995_186_10_a5,
     author = {L. M. Lerman and Ya. L. Umanskii},
     title = {Classification of four-dimensional integrable {Hamiltonian} systems and {Poisson} actions of $\mathbb R^2$ in extended neighbourhoods of simple singular points. {III.~Realization}},
     journal = {Sbornik. Mathematics},
     pages = {1477--1491},
     publisher = {mathdoc},
     volume = {186},
     number = {10},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_10_a5/}
}