The publication Statistics of Services provided to enterprises - 2012 disseminates the information in the context of a questionnaire performed to eight services provided to enterprises areas: computing and related activities; legal activities; accounting, auditing and consulting; architecture, engineering; technical testing and analysis; advertising; market research and public opinion polling and employment activities.
Instituto Nacional de Estatística - Estatísticas dos Serviços Prestados às Empresas : 2012. Lisboa : INE, 2013. Available at www: <url:https://www.ine.pt/xurl/pub/153376748>. ISSN 1646-2513. ISBN 978-989-25-0207-6