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Kurtz, M.J.; Eichhorn, G.; Accomazzi, A.; Grant, C.; Demleitner, M.; Murray, S.S.: Worldwide use and impact of the NASA Astrophysics Data System Digital Library (2005)
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Crovisier, R.; Intner, S.S.: Classification for astronomy : the QB schedule of the Library of Congress Classification (1987)
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Kuan, C.-H.; Liu, J.S.: ¬A new approach for main path analysis : decay in knowledge diffusion (2016)
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Min, C.; Ding, Y.; Li, J.; Bu, Y.; Pei, L.; Sun, J.: Innovation or imitation : the diffusion of citations (2018)
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Raan, A.F.J. van: ¬The influence of international collaboration on the impact of research results (1998)
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