Ponomarev, Andrei B., V.I. Kleveko, O.V. Moiseeva, and K.R. Kashapova. 2017. “FIBER REINFORCED SAND BACKFILL FOR UNDERGROUND PEDESTRIAN CROSSINGS”. Acta Polytechnica CTU Proceedings 10 (October):34-37. https://doi.org/10.14311/APP.2017.10.0034.