@article{10_4064_sm_30_3_273_338,
     author = {N. Aronszajn and U. Fixman},
     title = {Algebraic spectral problems},
     journal = {Studia Mathematica},
     pages = {273--338},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1968},
     doi = {10.4064/sm-30-3-273-338},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-30-3-273-338/}
}