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Zheng, H., Roseta-Palma, C. & Ramalho, J.J.S. (2019). Firm-level evidence on directed technological change involving energy input in Portugal. 4th Annual APEEN Conference.
H. Zheng et al., "Firm-level evidence on directed technological change involving energy input in Portugal", in 4th Annu. APEEN Conf., Covilhã, 2019
@misc{zheng2019_1734866392237, author = "Zheng, H. and Roseta-Palma, C. and Ramalho, J.J.S.", title = "Firm-level evidence on directed technological change involving energy input in Portugal", year = "2019", howpublished = "Digital", url = "http://wordpress.ubi.pt/4apeen2019/" }