Karbownik M, Modrzejewska H, Reiter R, Zasada K, Greger J, Lewinski A. Pyrimidine and purine salvage deoxyribonucleoside metabolism in hepatic and renal homogenates from rats pretreated with propylthiouracil or L-thyroxine.  Neuro Endocrinol Lett. 2000 Jan;  21(1): 51-55

Gesing A, Modrzejewska H, Karbownik M, Sewerynek E, Greger J, Lewinski A. Thymidine kinase and adenosine kinase activities in homogenates of thyroid lobes in hemithyroidectomized rats; effects of melatonin in vitro.  Neuro Endocrinol Lett. 2000 Jan;  21(6): 453-459