Evans, W. Desmond, Gyorgi E. Karadzhov, y David E. Edmunds. 2007. «Sharp Estimates of the Embedding Constants for Besov Spaces bs p,q, 0 < p < 1».
Revista Matemática Complutense
20, nº 2: 445-62. https://doi.org/10.5209/rev_REMA.2007.v20.n2.16505