@article{AFM_1991_16_1_a16,
     author = {Bernhard Steinig},
     title = {On the essential maximality of linear operators in a {Hilbert} space},
     journal = {Annales Fennici Mathematici},
     pages = {199--210},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1991},
     doi = {10.5186/aasfm.1991.1627},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1991.1627/}
}