Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 1, pages 21-22

Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 3, pages 62-65

Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 3, pages 74-75

Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 3, pages 81-83

Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 4, pages 96-101

Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 4, pages 102-103

Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 4, pages 104-105

Published in Carnivorous plant newsletter, in 1981, in volume 10, issue 4, pages 108-109