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2. Skeletal changes in preterm infants;Koo, W.W.K.; Gupta, J.M.; Nayanar, VV, Wilkinson; M, Posen; S.;Arch Dis Child,1982
3. Plasma alkaline phosphatase activity in the preterm neonate;Kovar, I.; Mayne, P.;Acta Paediatr Scand,1981
4. Osteoporosis: the potentialities and limitations of its roentgenologic diagnosis;Lachman, E.;American Jourtnal of Roentgenology,1955
5. Plasma alkaline phosphatase activity: a screening test for rickets in preterm neonates;Kovar, I.; Mayne, P.; Barltrop, D.;Lancet,1982