1. Challenges to the theories of B stars circumstellar environment Creator: Krtička, J., Korčáková, D., and Kubát, J. Format: bez média and svazek Type: model:article and TEXT Subject: stars: winds, stars: outflows, stars: mass-loss, stars: early-type, hydrodynamics, and instabilities Language: Czech Description: We review recent developments in the field of B stars circumstellar environment modelling and discuss future improvements which are necessary to obtain more realistic models of the circumstellar environment of B stars. Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public