1. Backeberg Curt - Cactus Lexicon, with descriptions of many species (1966-73) by Walther Haage, Blandford Press Ltd., 1977

2. Walter Haage - Das praktische Kakteenbuch in Farben, Neuman Verlag, 1965

3. Walter Haage - Schone Kakteen richtig pflegen, Neuman Verlag

4. Clive Innes and Charles Glass - The Illustrated Encyclopedia of Cacti, Grange Books, 1997

5. Groupo San Luis - The Genus Turbinicarpus in San Luis Potosi, Cactus&Co. libri, 2004

6. Rudolf Subik & Libor Kunte, The Complete Encyclopedia of Cacti, Rebo Publishers, 2003

7. Milles Anderson - The World Encyclopedia of Cacti & Succulents, Hermes House, 2003

8. Farre Arana C - Le grand livre de cactus, Edition de Vecchi, 2001

9. Franz Becherer - Cactus, Hachette, 1991

10. Terry Hewitt - Cactus et Plantes Grasses, Editions Fontaine, 1996

11. Rudolf Subic - Cacti and Succulents, Treasure Press, 1989

12. Rod&Ken Preston-Mafham - Kakteen - Atlas, Eugen Ulmer Verlag, 1992

13. Edward F. Anderson – The Cactus Family, Timber Press,Inc, 2001 

14. David Hunt – The New Cactus Lexicon, Remous Ltd, Milborne Port, 2006 

15. John Pilbeam & Bill Weightman - Ariocarpus et cetera - The special smaller genera of Mexican Cacti, The British Cactus & Succulent Society, 2006 

16. John Pilbeam & David Hunt - A Sulco Gallerey , Remous Ltd, Milborne Port, 2004 

17. Zdenek Jezek & Libor Kunte - The Complete Encyclopedia of Succulets, Rebo International b.v., 2005 

I. www.mesagarden.com - Seed List

II. www.cactus-art.biz -  Cactus Art Nursery

III. www.living-rocks.com

IV. www.shaboten.com/ariohb.html

V. www.astrobase.de

VI. www.mfaint.demon.co.uk/cactus/turbo/