Kupka, F. Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Kupka, F. (2007). Some open questions concerning the modelling of non-locality in Reynolds stress type models of stellar convection. In F. Kupka, I. Roxburgh, & K. Chan (Eds.), Convection in Astrophysics (pp. 92-94). Cambridge, UK: Cambridge University Press.