A new formulation of the protective coating for historical monumentsRachid Benkmil, Lahcen Bahi, Ahmed Akhssas, Latifa Ouadif, Driss Elhachmi and Toufiq Ait El fakihE3S Web Conf., 150 (2020) 03020DOI: https://doi.org/10.1051/e3sconf/202015003020