Breitschwerdt, D. Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;
Völk, H.J. Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;
Breitschwerdt, D., Dogiel, V., & Völk, H. (2003). The Cosmic Ray Gradient Problem. In A. Semikhatov, M. Visiliev, & V. Zaikin (Eds.), Proceedings of the 3rd International Sakharov Conference on Physics (pp. 291-295). Singapore: Scientific World.