
Universidade Fernando Pessoa and INA, Portugal
volume 45, number 3, 2010, page 136 to 170
László Csaba, Iain Begg, Francisco Torres, Annette Bongardt, Karel Lannoo, Philippe Pochet, Luc Soete, Christian Egenhofer
volume 42, number 1, 2007, page 32 to 42
Francisco Torres, Annette Bongardt