References
Jean Paul Van Bendegen
(2005). Can there be an alternative mathematics, really?. In M. H. G. . Hoffmann, J. Lenhard & F. Seeger (eds.) Activity and sign (pp. 349-359). Dordrecht: Springer.
(2005). Can there be an alternative mathematics, really?. In M. H. G. . Hoffmann, J. Lenhard & F. Seeger (eds.) Activity and sign (pp. 349-359). Dordrecht: Springer.