1. B. S. Něganov, R. S. Šafrata, J. Šebek, K. Švec
    A simple He3-He4 dilution refrigerator
    Czechoslovak Journal of Physics 20 (1970) 1316-1318.
  2. B. Velický, K. Levin
    Optical constants of disordered binary alloys: interband transitions in the coherent-potential approximation
    Phys. Rev. B 2 (1970) 938
  3. K. Král
    A contribution to the theory of exciton generation by fast electron scattering in non-metallic crystals
    Czech. J. Phys. 20 (1970) 655