1. National Minerals Information Center. Cement Statistics and Information. URL: https://www.usgs.gov/centers/nmic/cement-statistics-and-information#myb
2. Mirovoe proizvodstvo cementa. (Geologicheskaja Sluzhba SShA, U.S. Geological Survey). URL: https://aftershock.news/?q=node/743928
3. Doklad Amerikanskoj associacii proizvoditelej cementa (USGS Mineral Program Cement Report). URL: https://pubs.usgs.gov/periodicals/mcs2020/mcs2020-cement.pdf
4. N. Majid, The white cement market (Doha, 2012). URL: http://www.intercem.com/ftpdocs/doha2012/Majid%20Miknam.pdf.