@article{MZM_2009_86_4_a11,
     author = {M. G. Plotnikov},
     title = {Generalized {Riemann-Type} {Integrals} on the {Plane} and an {Example} of {Double} {Haar} {Series}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {601--611},
     publisher = {mathdoc},
     volume = {86},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_86_4_a11/}
}