EKEmmanouil Kirtas EngineeringSerres, GreeceFollowTechnological Educational Institute of Central Macedonia, Serres, GreeceUsage metrics Co-workers & collaboratorsEREmmanouil RovithisEmmanouil RovithisDBDimitrios BliziotisDimitrios BliziotisKMKonstantia MakraKonstantia MakraKKKiriaki KonstantinidouKiriaki KonstantinidouCMCharalampos ManesisCharalampos Manesis