BorellU.FernstömI. (1957). The value of the ‘halo sign’ in the diagnosis of intra-uterine death. Acta radiol. (Stockh.,)48, 401
2.
CrickA. F.SimsF. H. (1953). Gas within the foetus indicating foetal death. J. Fac. Radiol., 5, 126
3.
DeuelH. (1947). Zur Rontgendiagnose des intrauterinen Fruchttodes. Schweiz. med. Wschr., 77, 1003
4.
HolmO. F. (1956) Occurrence of free gas in the fetus in cases of intrauterine death. Acta radiol. (Stockh.), 45, 257
5.
HolmO. F. (1958). Deuel's Halo Sign. Amer. J. Roentgenol., 80, 681
6.
MilneG. P. (1939). Delivery of a live infant after radiological diagnosis of intra-uterine death. J. Obstet. Gynaec. Brit. Emp., 46, 77
7.
SamuelE.GunnK. (1955). Gas embolus as a roentgen sign of fetal death. Amer. J. Roentgenol., 73, 974
8.
SpaldingA. B. (1922). A pathognomonic sign of intra-uterine death. Surg. Gynec. Obstet., 34, 754
9.
StewartA. M. (1957). The importance of the radiographic demonstration of free gas in the foetus in the diagnosis of intra-uterine death. J. Obstet. Gynaec. Brit. Emp., 64, 915
10.
ZuppingerA. (1952) in Von SchinzH. R., BaenschW. E.FreidlE.UehlingerE.Lehrbuch der Rontgendiagnostik. 5th edition, p. 3719. Stuttgart: Thieme.
