1. Prodrugs: Challenges and Rewards Part I and II. Stella VJ, Borchardt RT, Hageman MJ, Oliyai R, Maag H, Tilly JW. (Eds). Springer Science, NY, USA (2007).
2. SloanKB. Functional group considerations in the development of prodrug approaches to solving topical delivery problems. In:Prodrugs: Topical and Ocular Drug Delivery. Sloan KB (Ed.). Marcel Dekker Inc, NY, USA,17–116 (1992).
3. MorrisonRT, Boyd RN. In:Organic Chemistry (6th Edition).Allyn and Bacon Inc, MA, USA (2003).
4. Design for Optimized Topical Delivery: Prodrugs and a Paradigm Change