[Boost-users] Spherical Bessel function (nu, x as real) implementation

Dear developpers, 1) Does you use this reference to compute Spherical Bessel Functions for real argument? Accurate recursive generation of spherical Bessel and Neumann functions for a large range of indices E. Gillman http://scitation.aip.org/content/contributor/AU0510272^1 and H. R. Fiebig http://scitation.aip.org/search?value1=H.+R.+Fiebig&option1=author&option912=resultCategory&value912=ResearchPublicationContentComput. Phys. 2, 62(1988); http://dx.doi.org/10.1063/1.168296 2) is there a way to speed up the computation of j_nu(x) if one wants 10 digits accuracy for instance? Best regards J.E