Agata Wronska, Jacek Andres, Tomasz Altamer, Agata Dudek and Robert Ulewicz 2019. Effect of Tool Pin Length on Microstructure and Mechanical Strength of the FSW Joints of Al 7075 Metal Sheets. Communications - Scientific letters of the University of Zilina. 21, 3 (Aug. 2019), 40-47. DOI:https://doi.org/10.26552/com.C.2019.3.40-47.