@article{CRPHYS_2019__20_7-8_671_0,
     author = {Fran\c{c}ois Biraben},
     title = {The first decades of {Doppler-free} two-photon spectroscopy},
     journal = {Comptes Rendus. Physique},
     pages = {671--681},
     publisher = {Elsevier},
     volume = {20},
     number = {7-8},
     year = {2019},
     doi = {10.1016/j.crhy.2019.04.003},
     language = {en},
}