@article{SM_1998_189_10_a3,
     author = {G. I. Marchuk},
     title = {Construction of adjoint operators in non-linear problems of mathematical physics},
     journal = {Sbornik. Mathematics},
     pages = {1505--1516},
     year = {1998},
     volume = {189},
     number = {10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1998_189_10_a3/}
}