AstonG. H.AttixP. H.: An interoomparison of the roentgen standards of Great Britain and U. S. A. Acta radiol.46 (1956), 747.
2.
KempL. A. W.HallSheila M.: A precision investigation of some aspects of parallel-plate free-air chamber geometry. Brit. J. Radiol.27 (1954), 219.
3.
SievertR. M.: Eine Methode zur Messung von Röntgen-, Radium- und Ultrastrahlung nebst einige Untersuchungen über die Anwendbarkeit derselben in der Physik und der Medizin, p. 43. Acta radiol. Suppl.14 (1932).
4.
ThoraeusR.: A study of the ionization method for measuring the intensity and absorption of roentgen rays and of the efficiency of different filters used in therapy. Acta radiol. Suppl.15 (1932).
5.
ThoraeusR.: A portable secondary standard for roentgen ray measurements. Acta radiol.16 (1935), 735.
6.
ThoraeusR.: Status of roentgen ray standards in Sweden, and a brief report on the first part of an interoomparison between national roentgen ray standards. Acta radiol. Suppl.117 (1955).
7.
ThoraeusR.OosterkampW. J.ProperJ.JaegerR.RajewskyB.BundeE.DorneichM.LangD.SewkorA.: Vergleichsmessungen des internationalen röntgen” im Bereich von 8 kV bis 170 kV Erzeugungsspannung. Strahlentherapie98 (1955), 265.
8.
ThoraeusR.WyckoffH. O.: Calibration of the portable Swedish free-air chamber equipment at the U. S. National Bureau of Standards. Acta radiol.46 (1956), 741.
9.
WyckoffH. O.AstonG. H.SmithE. E.: A comparison of X-ray standards. Brit. J. Radiol.27 (1954), 325.