http://www.cact.cz/noviny/2014/07/Astrophytum.htm, http://www.starastrophytum.com/I-EN.html?lang=en&page=Iastrophytum/novaya kniga
1Novaya kniga pro astrophytum, esli interesno smotrite http://www.cact.cz/noviny/2014/07/Astrophytum.htm, http://www.starastrophytum.com/I-EN.html?lang=en&page=I
http://www.cact.cz/noviny/2014/07/Astrophytum.htm, http://www.starastrophytum.com/I-EN.html?lang=en&page=I
