A. Castillo and  A. Gutiérrez and  J.M. Gutiérrez and  J.M. Gómez and  E. García-López,  Blackout on Outdoor Light.   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2013, vol. 75(3). 528 - 531
    [viewed 27 October 2021]. Available from: https://publications.waset.org/pdf/4464.