@article{seaton:1983:qdt,
    author = {Seaton, M. J.},
     title = {Quantum defect theory},
   journal = {Rep. Prog. Phys.},
    volume = {46},
      year = {1983},
    number = {2},
     pages = {167–257},
       doi = {10.1088/0034-4885/46/2/002}}