Published in Revista De La Academia Canaria De Ciencias, in 1995, in volume 7, issue 2, pages 9-22

Published in Revista De La Academia Canaria De Ciencias, in 1995, in volume 7, issue 2, pages 25-43

Published in Revista De La Academia Canaria De Ciencias, in 1995, in volume 7, issue 2, pages 47-61

Published in Revista De La Academia Canaria De Ciencias, in 1995, in volume 7, issue 2, pages 63-75

Published in Revista De La Academia Canaria De Ciencias, in 1995, in volume 7, issue 2, pages 77-91

Published in Revista De La Academia Canaria De Ciencias, in 1995, in volume 7, issue 2, pages 113-133

Published in Revista De La Academia Canaria De Ciencias, in 1995, in volume 7, issue 2, pages 163-192