Influence of friction plate roughness on the external friction angle of wheat kernels - Kaliniewicz, Zdzisław; Anders, Andrzej; Jadwisieńczak, Krzysztof; Markowski, Piotr; Żuk, Zbigniew (The Annals of the University Dunarea de Jos of Galati. Fascicle VI - Food Technology, 2019)