J. Heldt

Stark effect of atomic helium second triplet series in electric fields up to 1600 kV cm−1

E. Winklhofer, L. Windholz, T. Wasowicz, 2008 .

Interference Effect in Mixed Multipole Lines of Bi i

S. Mrozowski, J. Heldt, 1970 .

Hyperfine Structure of the Multipole Lines of Bismuth (Bi i)

J. Heldt, 1968 .

Zeeman Effect in Multipole Lines of Te i

J. Heldt, 1967 .

Investigation of excitation mechanisms in the He−Cd plasma

J. Heldt, L. Kochanowski, 1977 .