Published in Boletin De La Sociedad De Biologia De Concepcion, in 1990, in volume 61, pages 7-27

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1990, in volume 61, pages 39-47

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1990, in volume 61, pages 71-92

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1990, in volume 61, pages 103-119

Published in Boletin de la Sociedad de Biologia de Concepción, in 1990, in volume 61, pages 135-144

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1990, in volume 61, pages 145-147