Zaimo─člu, A.. "The Effect of Randomly Distributed Polypropylene Fibers Borogypsum Fly Ash and Cement on Freezing-Thawing Durability of a Fine-Grained Soil". World Academy of Science, Engineering and Technology, Open Science Index 104, International Journal of Civil and Environmental Engineering, (2015), 9(8), 1116 - 1120.