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In his writings and speeches, Marais often referred to Richard Weaver, C.J. Langenhoven, Tobie Muller, James Burnham, Alexis de Tocqueville, Edmund Burke, C.K. Chesterton, Alain de Benoist, Oswald Spengler, Arnold Toynbee, Ludwig von Mises, F.A. von Hayek and Ortega y Gasset.
In later years, Polo would also be able to attend lectures by Zubiri on the concept in Madrid and another by Ortega y Gasset on Toynbee.
Dr. Coutinho has also been a visiting professor at the University of Paris XIII, the University of Texas, the Institute Ortega y Gasset in Spain, as well as at the University of São Paulo (USP).
He has worked as a lecturer at numerous institutions, including: College of Europe, Catholic University of Lisbon, the New University of Lisbon, School of Economics London, School of Chicago Law School, Centre for Political and Constitutional Studies in Spain, Instituto Ortega y Gasset in Madrid and Institute of European Studies of Macau.