Borowiec , J.; Thelin , S.; Bagge , L.; van der Linden , J.; Thörnö , E.; Hansson , H.-E. Heparin-Coated Cardiopulmonary Bypass Circuits and 25% Reduction of Heparin Dose in Coronary Artery surgery—a Clinical Study. ujms 1992, 97, 55-66.