1. Gestational age assessment. I. Analysis of individual clinical observations;Anderson;Am. J. Obstet. Gynecol.,1981
2. The growth of long bones in human embryological and fetal upper limbs and its relationship to other developmental patterns;Bareggi;Anat Embryol.,1994
3. Ossification of the fetal spine;Budorick;Radiology,1991
4. A study on the development of vertebral column in reference to the gestational ages of fetuses;Chen;Hua Hsi I Ko Ta Hsueh Hsueh Pao,1991
5. 5 Clemente, C. , 1985: Osteology: ossification and skeletal development. In: Gray’s Anatomy, 30th edn (C. Clemente, ed.). Philadelphia, PA: Lea & Febiger, p. 147.