@article{MZM_2013_94_3_a0,
     author = {M. Yu. Balakhnev},
     title = {Integrable {Vector} {Isotropic} {Equations} {Admitting} {Differential} {Substitutions} of {First} {Order}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {323--330},
     publisher = {mathdoc},
     volume = {94},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2013_94_3_a0/}
}