Statkus, Tautvydas, and Vaidas Martinkus. “The Results of Corelation Between Cone Tip Resistance, Push-in Pressure Load Cells and a Compression Device”. Mokslas – Lietuvos Ateitis Science – Future of Lithuania, vol. 5, no. 5, Dec. 2013, pp. 525-9, https://doi.org/10.3846/mla.2013.82.