Bojensen Homepage: http://www.bojensen.net/

Botanicus:  http://www.botanicus.org/

Chemguide: http://www.chemguide.co.uk/index.html#top

Garnot Katzer's Spice Pages:  http://gernot-katzers-spice-pages.com/engl/index.html

Henriette's Herbal Homepage: http://www.henriettesherbal.com/index.html

Internet Archive: http://archive.org/

MBG Library: http://www.illustratedgarden.org/mobot/rarebooks/index.asp

The Virtual Laboratory:  http://vlp.mpiwg-berlin.mpg.de/index_html

Obvestila, gradiva, forum ipd. o predmetih prof. Krefta: http://kreft.weebly.com/index.html

Richard Dawkins - dokumentarni film o znanstveni neosnovanosti zdravilstva: http://video.google.com/videoplay?docid=-4720837385783230047