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Fotiadi, Andrei A.; Mégret, Patrice; Blondel, Michel. (2004). Dynamics of a self-Q-switched fiber laser with a Rayleigh-stimulated Brillouin scattering ring mirror. ol/29/10/ol-29-10-1078.pdf, 29(10), 1078–0. doi:10.1364/OL.29.001078 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research