Published in Revista De La Academia Canaria De Ciencias, in 1990, in volume 2, issue 1, pages 15-22

Published in Revista de la Academia Canaria de Ciencias, in 1990, in volume 2, issue 1, pages 23-31

Published in Revista de la Academia Canaria de Ciencias, in 1990, in volume 2, issue 1, pages 33-68

Published in Revista De La Academia Canaria De Ciencias, in 1990, in volume 2, issue 1, pages 71-79

Published in Revista De La Academia Canaria De Ciencias, in 1990, in volume 2, issue 1, pages 81-92

Published in Revista de la Academia Canaria de Ciencias, in 1990, in volume 2, issue 1, pages 93-97

Published in Revista De La Academia Canaria De Ciencias, in 1990, in volume 2, issue 1, pages 99-120

Published in Revista de la Academia Canaria de Ciencias, in 1990, in volume 2, issue 1, pages 121-142

Published in Revista de la Academia Canaria de Ciencias, in 1990, in volume 2, issue 1, pages 143-167

Published in Revista De La Academia Canaria De Ciencias, in 1990, in volume 2, issue 1, pages 171-190

Published in Revista de la Academia Canaria de Ciencias, in 1990, in volume 2, issue 1, pages 191-238