1
by Ronald Witt
Published 2013
MDPI AG - Multidisciplinary Digital Publishing Institute

2
by Dinzelbacher, Peter
Published 1996
Schöningh

3
by Gerlach, Jonas
Published 2017
Modern Academic Publishing

4
by Carmen Soares
Published 2018
Coimbra University Press

5
by José Luís Brandão
Published 2018
Coimbra University Press