F. H. Wang, J. J. Sun, G. Y. Deng and J. C. Mo, “Does Intervention in Utero Preserve the Obstructed Kidneys of Fetal Lambs? A Histological, Cytological, and Molecular Study,” Pediatric Search, Vol. 66, No. 2, 2009, pp. 145-148.
 M. R. Harrison, D. K. Nakayama, R. Noall and A. A. de Lorimier, “Correction of Congenital Hydronephrosis in Utero II, Decompression Reverses the Effects of Obstruction on the Fetal Lung and Urinary Tract,” Journal of Pediatric Surgery, Vol. 17, No. 6, 1982, pp. 965-974. doi:10.1016/S0022-3468(82)80476-4
 T. M. Crombleholme, M. R. Harrison, M. S. Golbus, M. T. Longaker, J. C. Langer, P. W. Callen, R. L. Anderson, R. B. Goldstein and R. A. Filly, “Fetal Intervention in Obstructive Uropathy: Prognostic Indicators and Efficacy of Intervention,” American Journal of Obstetrics and Gynecology, Vol. 162, No. 5, 1990, pp. 1239-1244.
 M. N. Sheppard, P. J. Marangos, S. R. Bloom and J. M. Polak, “Neuron Specific Enolase: A Marker for the Early Development of Nerves and Endocrine Cells in the Human Lung,” Life Science, Vol. 34, No. 3, 1984, pp. 265-271. doi:10.1016/0024-3205(84)90598-8
 K. Asabe, R. W. Jennings, M. R. Harrison and S. Suita, “Quantitative Study of Pulmonary Endocrine Cells in Fetal, Postnatal and Adult Lambs,” Journal of Veterinary Medical Science, Vol. 66, No. 4, 2004, pp. 373-380. doi:10.1292/jvms.66.373
 L. Balaguer and J. Romano, “Solitary Neuroendorine Cells and Neuroepithelial Bodies in the Lower Airways of Embryonic, Fetal, and Postnatal Lambs,” The Anatomical Record, Vol. 231, No. 3, 1991, pp. 333-338. doi:10.1002/ar.1092310306
 D. G. Alcorn, T. M. Adamson, J. E. Maloney and P. M. Robinson, “A Morphologic and Morphometric Analysis of Fetal Lung Development in the Lambs,” Anatomy Research, Vol. 201, No. 4, 1981, pp. 655-667. doi:10.1002/ar.1092010410