@article{10_4171_dm_485,
     author = {Takashi Okaji and Hubert Kalf and Osanobu Yamada},
     title = {The {Dirac} operator with mass $m_0 \ge 0$: non-existence of zero modes and of threshold eigenvalues},
     journal = {Documenta mathematica},
     pages = {37--64},
     year = {2015},
     volume = {20},
     doi = {10.4171/dm/485},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/485/}
}