@article{IVM_2014_10_a3,
     author = {A. N. Mironov and L. B. Mironova},
     title = {Laplace invariants for fourth-order equation with two independent variables},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {27--34},
     publisher = {mathdoc},
     number = {10},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2014_10_a3/}
}