Collegiality in the European Commission: Legal Substance and Institutional Practice. by Maria Patrin (Oxford: Oxford University Press, 2023) - Common Market Law Review View Collegiality in the European Commission: Legal Substance and Institutional Practice. by Maria Patrin (Oxford: Oxford University Press, 2023) by - Common Market Law Review Collegiality in the European Commission: Legal Substance and Institutional Practice. by Maria Patrin (Oxford: Oxford University Press, 2023) 63 2 Common Market Law Review