@article{ZNSL_2013_419_a5,
     author = {Yu. K. Dem'yanovich and L. M. Romanovskiǐ},
     title = {Spline-wavelet coarsening of {Courant-type} approximations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {77--110},
     publisher = {mathdoc},
     volume = {419},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_419_a5/}
}