Coronavirus and the cost of non-Europe: An analysis of the economic benefits of common European actionEvas, Tatjana; Heflich, Aleksandra; Lomba, Niombo; Müller, Klaus; Navarra, Cecilia; Panella, Lauro; Saulnier, Jerome Leon; Stjernquist, Annika; Ballegooij, Wouter van2020 https://www.europarl.europa.eu/RegData/etudes/IDAN/2020/642837/EPRS_IDA(2020)642837_EN.pdf The Bulgarian Competition Authority sanctions municipal undertakings for charging excessive prices for bus terminal services (Zhilfond Pleven) [Electronic resource]Svetlicinii, Alexandre-Competitions2013