SZAJNA, Waldemar Stanisław. “Evaluation of the State of Aandy Soils on a Sinkhole Area With the Use of Noninvasive (MASW) and Invasive (SDMT) Tests”. Engineering Transactions 63, no. 1 (February 13, 2015): 109–131. Accessed June 11, 2025. https://et3.ippt.pan.pl/index.php/et/article/view/288.