@article{10_21136_CMJ_1980_101651,
     author = {Brown, Richard C. and Tvrd\'y, Milan},
     title = {Generalized boundary value problems with abstract side conditions and their adjoints. {I}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {7--27},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1980},
     doi = {10.21136/CMJ.1980.101651},
     mrnumber = {565904},
     zbl = {0454.47025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1980.101651/}
}