Levytskyi, V., Korobiichuk, V., Shamrai, V., Sobolevskyi, R., & Sydorov, O. (2018). Evaluation of the effectiveness of natural stone surface treatment from Ukraine by mechanical and chemical methods. Rudarsko-geološko-Naftni Zbornik, 33(4). https://doi.org/10.17794/rgn.2018.4.2