References:
The International Nutrition Company Special Report, "Pine vs. Pine Comparative
Analysis between Masquelier's Original Pine Bark OPCs and another leading brand
pine bark extract," Oc. 1998.
PhytoChem Technologies, Inc., Chelmsford,
Massachusetts, Ju. 1998.
The International Nutrition Company Special Report,"Masquelier's
Original OPCs and ten grape seed extracts; an independent, reproducible state-of-the-art
comparative analysis," No. 1997.
Masquelier, J. Plant extract with a
proanthocyanidins content as a therapeutic agent having radical scavenging effect
and use thereof. U.S. Patent No. 4,698,360, 1987.
Masquelier, J. A lifetime
devoted to OPC and Pycnogenols. Alfa Omega Editrice, Pub., 1996.
Schwitters,
B., Masquelier, J. OPC in practice. Alfa Omega Editrice, Publishers, 1995.