@article{gaunt:1929:th,
    author = {Gaunt, J.~A.},
     title = {The triplets of helium},
   journal = {Philos. Trans. Roy. Soc. London Ser. A},
      year = {1929},
    volume = {228},
     pages = {151-196},
       doi = {10.1098/rsta.1929.0004},
     zblno = {55.1178.02},
zblreviewer = {M\"oglich, Dr. F.}}