Vetenskapliga publikationer

Monthly Notices of the Royal Astronomical Society, Vol. 84, p.747-770, 1924: " The determination of the curvature of space-time in de Sitter's world"

The Observatory, Vol. 47, p. 279-281, 1924: "Determination of the apices and the mean parallax of the spirals"

Contr from the Mount Wilson Observatory, vol. 308, pp.1-5, 1926: "Internal motions of Messier 31"

Astronomische Nachrichten, volume 213, Issue 20, p.315: Mitteilung über Nova Cygni 1920

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