@article{EMJ_2010_1_2_a8,
     author = {I. N. Parasidis and P. C. Tsekrekos},
     title = {Correct and selfadjoint problems for quadratic operators},
     journal = {Eurasian mathematical journal},
     pages = {122--135},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2010_1_2_a8/}
}