1. Fischer E, Zach K (1913) Sitzber Kgl Preuss Akad Wiss 16: 311
2. Nicolau KC, Sorensen EJ (1966) Classics in Total Synthesis, VCH, Weinheim
3. McNaught AD (1997) J Carbohydr Chem 16: 1191
4. McNaught AD (1997) Adv Carbohydr Chem Biochem 52: 92
5. Helferich B (1952) Adv Carbohydr Chem 7: 209