D. H. Menzel, The Dilution of Radiation in a Nebula, Publications of the Astronomical Society of the Pacific, vol.43, pp.70-74, 1931.
DOI : 10.1086/124095

A. Einstein, Zur Quantentheorie der Strahlung, Physikalische Zeitschrift, vol.18, pp.121-128, 1917.

W. E. Lamb, J. , W. P. Schleich, M. O. Scully, and C. H. Townes, Laser physics: Quantum controversy in action, Reviews of Modern Physics, pp.263-273, 1999.

B. Strömgren, The Physical State of Interstellar Hydrogen., The Astrophysical Journal, vol.89, pp.526-547, 1939.
DOI : 10.1086/144074

H. Arp and C. Fulton, The 2dF Redshift Survey II: UGC 8584 -Redshift Periodicity and Rings, 2008.

G. L. Lamb and . Jr, Analytical Descriptions of Ultrashort Optical Pulse Propagation in a Resonant Medium, Reviews of Modern Physics, vol.15, issue.2, pp.99-124, 1971.
DOI : 10.1103/PhysRevLett.15.240

Y. X. Yan, E. B. Gamble-jr, and K. A. Nelson, Impulsive stimulated scattering: General importance in femtosecond laser pulse interactions with matter, and spectroscopic applications, The Journal of Chemical Physics, vol.83, issue.11, pp.3591-5399, 1985.
DOI : 10.1016/0301-0104(74)85030-5