M.J. Kurtz, Eichhorn G., Accomazzi A., Grant C.S., Demleitner M., Murray S.S. Worldwide Use and Impact of the NASA Astrophysics Data System Digital Library. „The Journal of the American Society for Information Science and Technology”. 56 (1), s. 36, 2005. DOI: 10.1002/asi.20095. Bibcode: 2005JASIS..56...36K. (Preprint).
M.J. Kurtz, Eichhorn G., Accomazzi A., Grant C.S., Demleitner M., Murray S.S. Worldwide Use and Impact of the NASA Astrophysics Data System Digital Library. „The Journal of the American Society for Information Science and Technology”. 56 (1), s. 36, 2005. DOI: 10.1002/asi.20095. Bibcode: 2005JASIS..56...36K. (Preprint).
M.J. Kurtz, Eichhorn G., Accomazzi A., Grant C.S., Demleitner M., Murray S.S. Worldwide Use and Impact of the NASA Astrophysics Data System Digital Library. „The Journal of the American Society for Information Science and Technology”. 56 (1), s. 36, 2005. DOI: 10.1002/asi.20095. Bibcode: 2005JASIS..56...36K. (Preprint).