• Employee performance, working time and tiredness in creative R&D jobs : employee survey from EstoniaHazak, Aaro; Virkebau, Marko; Tuulik, Viiu; Tint, Piia; Pille, Viive; Sõõru, Erve8th International Conference The Economies of Balkan and Eastern Europe Countries in the Changed World : EBEEC 2016 : Split, Croatia, May 5-8, 20162016 / p. 77