@article{ZNSL_1983_127_a1,
     author = {W. M. Zaj\k{a}czkowski and V. A. Solonnikov},
     title = {On the {Heumann} problem for second order elliptic equations in domains with edges at the boundary},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {7--48},
     publisher = {mathdoc},
     volume = {127},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_127_a1/}
}