1. A theory of the variation of the magnetical compass;Halley;Philos. Trans. R. Soc. Lond., A,1683
2. An account of the cause of the change of the variation of the magnetic needle; with an hypothesis of the structure of the internal part of the Earth;Halley;Philos. Trans. R. Soc. Lond., A,1692
3. On the secular motion of a free magnetic needle. II;Bauer;Phys. Rev.,1896
4. Sur la forme analytique de l'attraction magnétique de la terre;Carlheim-Gyllensköld;Astron. Iakt. Stockholm,1896
5. Description of the Earth's main magnetic field and its secular change, 1905–1945, Washington;Vestine,1947