Additional information

In the following, various Internet sources are being offered, which provide continuative literature around the theme "skin". 

• Informative website in wikipedia: http://en.wikipedia.org/wiki/Skin
• Site on skin and skin problems and diseases, among which e. g. acne, also for teens (commercial site): http://www.skinmed.co.uk/acne-treatment/science.html
• http://skincare.dermis.net/content/index_eng.html