1. University of Łódź, Faculty of Management, Department of Marketing 22/26 Matejki str., 90-237 Lodz, Poland
2. University of Beira Interior, Faculty of Architecture, Department of Civil Engineering and Architecture, Calçada Fonte do Lameiro, 6201-001 Covilhã, Portugal; CITAD Research Center, Rua da Junqueira, 188–198, 1349-001, Lisbon, Portugal