1
by Ereira, Alan
Published 1990
British Broadcasting Corporation (BBC)

2
by Noreen Herzfeld
Published 2017
MDPI AG - Multidisciplinary Digital Publishing Institute

3
by Tasa, Monika
Published 2016
University of Tartu Press

4
by Münch, Paul
Published 1998
Schöningh

6
by Scornaienchi, Lorenzo
Published 2008
Vandenhoeck & Ruprecht