@article{simon:1982:lop,
    author = {Simon, B.},
     title = {Large orders and summability of eigenvalue perturbation
              theory: A mathematical overview},
   journal = {Int. J. Quantum Chem.},
    volume = {21},
      year = {1982},
     pages = {3–25},
       doi = {10.1002/qua.560210103}}