1. Burrard, S. S.: The Attraction of the Himalaya Mountains upon the plumbline in India. Survey of India, professional paper 5.
2. Pratt, J. H.: On the Attraction of the Himalayan Mountains and of the elevated regions beyond them upon the plumbline in India. Phil. Trans. of London 145 (1855).
3. Die Höhenangaben stammen von A. v. Humboldt. In den späteren Untersuchungen: Pratt, J. H.: On the deflection of the plumbline in India caused by the attraction of the Himalaya Mountains and of the elevated regions beyond and its modifications by the compensating effect of a deficiency of matter below the mountain mass', Phil. Trans. of London 149, sind die Werte nach den Angaben der Brüder Strachey verbessert.
4. Airy, G. B.: On the compensation of the effect of the attraction of mountain-masses, as disturbing the apparent astronomical latitude of stations in geodetic surveys. Phil. Trans. of London 149.
5. Pratt, J. H.: On the influence of the ocean on the plumbline in Indiay. Phil. Trans. of London 149.