Published in Phegea, in 2001, in volume 36, issue 1, pages 19-20

Created: 2016-08-14, modified: 2016-08-14

Published in Phegea, in 2010, in volume 38, issue 4, pages 129-142

Created: 2015-12-27, modified: 2015-12-27

Published in Phegea, in 2003, in volume 31, issue 1, pages 39-40

Created: 2016-12-11, modified: 2016-12-11

Published in Phegea, in 1992, in volume 20, issue 4, pages 129-130

Created: 2016-08-14, modified: 2016-08-14