Smart Discovery of Cultural and Natural Tourist Routes. - Evangelos A. Stathopoulos; Ioannis Paliokas; Georgios Meditskos; Sotiris Diplaris; Spyridon Tsafaras; Efthalia Valkouma; George Pehlivanides; Christodoulos Riggas; Stefanos Vrochidis; Konstantinos Votis; Dimitrios Tzovaras; Ioannis Kompatsiaris (WI (Companion), 2019)