Progress in computing parton distribution functions from the quasi-PDF approach Constantia Alexandrou, Krzysztof Cichy, Martha Constantinou, Kyriakos Hadjiyiannakou, Karl Jansen, Haralambos Panagopoulos, Aurora Scapellato and Fernanda Steffens EPJ Web Conf., 175 (2018) 06021 Published online: 26 March 2018 DOI: 10.1051/epjconf/201817506021