@article{10_4064_sm_135_2_163_178,
     author = {Daniel Belti\c{t}\u{a}},
     title = {Spectrum for a solvable {Lie} algebra of operators},
     journal = {Studia Mathematica},
     pages = {163--178},
     publisher = {mathdoc},
     volume = {135},
     number = {2},
     year = {1999},
     doi = {10.4064/sm-135-2-163-178},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-135-2-163-178/}
}