//-->
Analyzing mobility in peripheral regions of the European Union : the case of Canarias-Madeira-Azores
Román García, Concepción, (2008)
Beiträge zur Geographie der mittelatlantischen Inseln
Klug, Heinz, (1973)
Portuguese Guinea/Guinea Bissau, Cape Verde, Sao Tomé e Principe, Portuguese-speaking Africa as a whole
Gowan, Susan J., (1983)