1. Smith LI, Renfrow WB, Opie JW (1942) J Am Chem Soc 64:1082
2. Mayer H, Isler O (1971) Tocopheramines and tocopherthiols. In: Colowick SP, Kaplan NO (eds) Methods in enzymology, vol 18, part C. Academic Press, New York, pp 275–334
3. Blomstrand R, Forsgren L (1968) Int J Vit Res 38:328
4. Schlegel W, Schwieter U, Tamm R (1969) Non-toxic antioxidants, based on chromane derivatives US. Pat. 3458637. Chem Abstr 69:21909
5. Søndergaard E, Dam H (1970) Z Ernähr 10:71