@book{Gelfand_RWA_1970,
  publisher = {PWN},
  year = {1970},
  author = {Gelfand, I.M. and Fomin, S.V.},
  title = {Rachunek wariacyjny}
}

@book{Karaskiewicz_ZTW_1976,
  publisher = {PWN},
  year = {1976},
  author = {Kara\'{s}kiewicz, E},
  title = {Zarys teorii wektor\'{o}w i tensor\'{o}w	}
}

@book{Bicadze_RFM_1984,
  publisher = {PWN},
  title = {R\'{o}wnania fizyki matematycznej	},
  author = {Bicadze, A.W.},
  year = {1984}
}