P. Paul, S. Díaz, A. Fernández, y M. Florencio, «The Space of Countably Simple Bounded Functions with Values in a DF-Space», Rev. mat. complut., vol. 7, n.º 2, p. 219, ene. 1994, doi: https://doi.org/10.5209/rev_REMA.1994.v7.n2.17731