QUASI-LANDAU RESONANCES : ANALYTIC TREATMENT OF THE HYDROGENIC SPECTRUM IN THE TWO-DIMENSIONAL MODEL AND RELATION TO OTHER STRONGFIELD PROBLEMS J. A.C. Gallas et R. F. O'ConnellJ. Phys. Colloques, 43 C2 (1982) C2-435-C2-437DOI: https://doi.org/10.1051/jphyscol:1982234