Σηλια ΣυμεωνιδηinStartupLab by ADandPRLAB | Panteion UniversityPart four: Value PropositionThe following post is part of the #TeenVibe project for the #CocaColaChallenge by the team Market Games of the Startup Lab of Panteion…Jun 3, 2017Jun 3, 2017