Does anyone know a book or article in a journal that defines biprofunctors between bicategories $\Bbb A$ and $\Bbb B$, as in nLab, i.e., as a pseudo functor $\Bbb A^{op}\times\Bbb B\to\Bbb C\rm{at}$? Perhaps it also exists under some other name, that I'm not familiar with..
I prefer not to refer only the nLab webpage..