 @book{gsn07,
 author = {Narasimhan, Giri and Smid, Michiel},
 title = {Geometric Spanner Networks},
 year = {2007},
 isbn = {0521815134},
 publisher = {Cambridge University Press},
 address = {New York, NY, USA},
} 

@article{nfa85,
 author = {Gerla, Giangiacomo and Tortora, Robert},
 title = {Normalization of Fuzzy Algebras},
 journal = {Fuzzy Sets Systems},
 issue_date = {September, 1985},
 volume = {17},
 number = {1},
 month = sep,
 year = {1985},
 issn = {0165-0114},
 pages = {73--82},
 numpages = {10},
 url = {http://dx.doi.org/10.1016/0165-0114(85)90008-9},
 doi = {10.1016/0165-0114(85)90008-9},
 acmid = {1708685},
 publisher = {Elsevier North-Holland, Inc.},
 address = {Amsterdam, The Netherlands, The Netherlands},
 keywords = {Fuzzy algebras, Isomorphism, Normalization},
} 

@book{KT06,
      author        = "Kleinberg, Jon and Tardos, Eva",
      title         = "{Algorithm design}",
      publisher     = "Pearson",
      address       = "Boston, MA",
      year          = "2006",
      url           = "https://cds.cern.ch/record/1485592",
      note          = "International edition",
}

@article{spanner13,
 author = {Corbett, James C. and Dean, Jeffrey and Epstein, Michael and Fikes, Andrew and Frost, Christopher and Furman, J. J. and Ghemawat, Sanjay and Gubarev, Andrey and Heiser, Christopher and Hochschild, Peter and Hsieh, Wilson and Kanthak, Sebastian and Kogan, Eugene and Li, Hongyi and Lloyd, Alexander and Melnik, Sergey and Mwaura, David and Nagle, David and Quinlan, Sean and Rao, Rajesh and Rolig, Lindsay and Saito, Yasushi and Szymaniak, Michal and Taylor, Christopher and Wang, Ruth and Woodford, Dale},
 title = {Spanner: Google: Globally Distributed Database},
 journal = {ACM Transaction on Computing  Systems},
 issue_date = {August 2013},
 volume = {31},
 number = {3},
 month = aug,
 year = {2013},
 issn = {0734-2071},
 pages = {8:1--8:22},
 articleno = {8},
 numpages = {22},
 url = {http://doi.acm.org/10.1145/2491245},
 doi = {10.1145/2491245},
 acmid = {2491245},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {Distributed databases, concurrency control, replication, time management, transactions},
} 