How Do Contributors Impact Code Naturalness? An Exploratory Study of 50 Python Projects. - Thanadon Bunkerd; Dong Wang 044; Raula Gaikovina Kula; Chaiyong Ragkhitwetsagul; Morakot Choetkiertikul; Thanwadee Sunetnanta; Takashi Ishio; Kenichi Matsumoto (IWESEP, 2019)