Goulão, Catarina and Perelman, Julian (2014) Interactions Between Public and Private Providers. In: Encyclopedia of Health Economics Elsevier. pp. 77-82. ISBN 978-0-12-375679-4

Goulão, Catarina and Perelman, Julian (2014) The interaction between a public and a duplicate private provider of health services. In: Encyclopedia of Health Economics Encyclopedia of Health Economics. ISBN 978-0-12-375679-4