1. Rajatanavin R., Braverman L.E. Euthyroid hyperthyroxinemia. J. Endocrinol. Invest. 6: 493, 1983
2. Wartofsky L. Indicazioni diagnostiche per il dosaggio dell’ormone tiroideo libera in malattie tiroidee e non. Lig. Quarter. 3: 49, 1984.
3. Hay I.D., Klee G.G. Thyroid disfunction. Endocrinol. Metab. Clin. North Am. 17: 473, 1988.
4. Schatz D.L., Palter H.C., Russell C.S. Effects of oral contraceptives and pregnancy on thyroid function. Can. Med. Ass. J. 99: 882, 1968.
5. Fisher D.A., Hobel C.J., Garza R., Pierce C.A. Thyroid function in the preterm fetus. Pediatrics 46: 208, 1970.