Research and practical issues of enterprise information systems : 12th IFIP WG 8.9 Working Conference, CONFENIS 2018, held at the 24th IFIP World Computer Congress, WCC 2018, Poznan, Poland, September 18-19, 2018 : proceedings - Tjoa, A Min; Raffai, Maria; Doucek, Petr, 1960-; Novak, Niina Maarit (Lecture notes in business information processing,, 2018)