@article{10_4153_CJM_1987_006_0,
     author = {Hinton, D. B. and Shaw, J. K.},
     title = {Dirac {Systems} with {Discrete} {Spectra}},
     journal = {Canadian journal of mathematics},
     pages = {100--122},
     year = {1987},
     volume = {39},
     number = {1},
     doi = {10.4153/CJM-1987-006-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-006-0/}
}