@misc{141221,
  author = {J Sugar and Arlene Musgrove},
  title = {Energy Levels of Krypton, Kr I through Kr XXXVI},
  year = {1991},
  number = {20},
  month = {1991-01-01},
  publisher = {J. Phys. & Chem. Ref. Data (JPCRD), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}