Online Tourism System Development for Searching and Planning Trips with User's Requirements. - Nataliya Antonyuk; Mykola Medykovskyy; Liliya Chyrun; Mykola Dverii; Oksana Oborska; Maksym Krylyshyn; Artem Vysotsky; Nadiia Tsiura; Oleh Naum (CSIT, 2019)