@book{eti,
  author       = {Steven Schwartzman},
  title        = {The words of mathematics.  An etymological
                  dictionary of mathematical terms used in English.},
  year         = {1980},
  publisher    = {The Mathematical Association of America},
  location     = {United States},
  ISBN = {0-88385-511-9}, %% , 978-0-88385-511-9
}

@book{knuthv1,
 author = {Knuth, Donald E.},
 title = {The Art of Computer Programming, volume 1, fundamental algorithms},
 edition = {3},
 year = {1997},
 ISBN = {0-201-89683-4},
 publisher = {Addison-Wesley Longman Publishing Co., Inc.},
 address = {Boston, MA, USA},
}

@book{mccoy, 
  author = {Neal H. McCoy and Gerald J. Janusz},
  title = {Introduction to Modern Algebra},
  year = {1992},
  publisher = {Wm. C. Brown Publishers},
  ISBN = {0-697-08570-8},
  edition =   {5},
}

@book{hardy-pure,
   title =     {A course of pure mathematics},
   author =    {G.~H. Hardy},
   publisher = {Cambridge University Press},
   isbn =      {},
   year =      {1967},
   edition =   {10},
}

@book{stewart,
   title =     {Calculus},
   author =    {James Stewart},
   publisher = {Brooks Cole},
   isbn =      {978-0-495-01160-6}, %% 0-495-01160-6 , 
   year =      {2007},
   series =    {},
   edition =   {6},
   volume =    {},
 }


@book{calculo,
   title =     {Cálculo},
   author =    {James Stewart},
   publisher = {Cengage Learning},
   isbn =      {978-85-221-0968-5},
   year =      {2009},
   series =    {},
   edition =   {6},
   volume =    {1},
 }