1. Leybold-Johnson I. “A Swiss apple a day keeps wrinkles at bay.” Swissinfo.ch. November 28, 2009.
2. Hardy L. “Could the extract from a rare Swiss apple REALLY get rid of your wrinkles?” Daily Mail.com. 30 November 2009.
3. PhytoCell Tech MalusDomestica data sheet.
4. Hardy L. “Could the extract from a rare Swiss apple REALLY get rid of your wrinkles?” Daily Mail.com. 30 November 2009.
5. X Li., et al. “Skin Stem Cell Hypotheses and Long Term Clone Survival - Explored Using Agent-based Modelling.” Scientific Reports. 2013.
6. PhytoCell Tech MalusDomestica data sheet.
7. Resistem data sheet.
8. Sederma launches Resistem - a natural ingredient with anti-aging benefits. Special Chem. 2011. Viewed 8/1/13.
9. Ghersetich I., et al. “Hyaluronic acid in cutaneous intrinsic aging.” Int J Dermatol. 1994 Feb.