BALU, M.-E.; MLADEN, L. Labour productivity as a factor of sustainable economic development. Annals of Spiru Haret University. Economic Series , [S. l.], v. 10, n. 3, p. 95–103, 2010. Disponível em: https://anale.spiruharet.ro/economics/article/view/10310. Acesso em: 27 apr. 2024.