Encyclopaedia of Mathematics: vol 5: I-Lit
Hazewinkel, M.
Encyclopaedia of Mathematics: vol 5: I-Lit M. Hazewinkel - Dordrecht, Boston, London Kluwer Academic Publishers -1988
Encyclopaedia of Mathematics: vol 5: I-Lit M. Hazewinkel - Dordrecht, Boston, London Kluwer Academic Publishers -1988