deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 956f0b5..22c2ee1 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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adsnote = {Provided by the SAO/NASA Astrophysics Data System}  }  @ARTICLE{Pelt++1996,   author = {{Pelt}, J. and {Kayser}, R. and {Refsdal}, S. and {Schramm}, T.   },   title = "{The light curve and the time delay of QSO 0957+561.}",   journal = {\aap},   eprint = {arXiv:astro-ph/9501036},   keywords = {METHODS: STATISTICAL, QUASARS: Q 0957+561A,B, GRAVITATIONAL LENSING},   year = 1996,   month = jan,   volume = 305,   pages = {97},   adsurl = {http://adsabs.harvard.edu/abs/1996A%26A...305...97P},   adsnote = {Provided by the SAO/NASA Astrophysics Data System}   }     @ARTICLE{Pelt++1994,   author = {{Pelt}, J. and {Hoff}, W. and {Kayser}, R. and {Refsdal}, S. and   {Schramm}, T.},   title = "{Time delay controversy on QSO 0957+561 not yet decided}",   journal = {\aap},   eprint = {arXiv:astro-ph/9401013},   keywords = {METHODS: STATISTICAL, QUASARS: 0957+561A,B, GRAVITATIONAL LENSING},   year = 1994,   month = jun,   volume = 286,   pages = {775-785},   adsurl = {http://adsabs.harvard.edu/abs/1994A%26A...286..775P},   adsnote = {Provided by the SAO/NASA Astrophysics Data System}   }  @ARTICLE{Refsdal1964,  author = {{Refsdal}, S.},  title = "{On the possibility of determining Hubble's parameter and the masses of galaxies from the gravitational lens effect}",