La Place, Pierre Simon, Marquis de[англ.].Mécanique Céleste. — Boston, MA, 1829. — С. volume I, chapter V, especially page 121.. — «English translation published in four volumes, 1829–1839; originally published as Traite de mécanique céleste [Treatise on Celestial Mechanics] in five volumes, 1799–1825.».
La Place, Pierre Simon, Marquis de[англ.].Mécanique Céleste. — Boston, MA, 1829. — С. volume I, chapter V, especially page 121.. — «English translation published in four volumes, 1829–1839; originally published as Traite de mécanique céleste [Treatise on Celestial Mechanics] in five volumes, 1799–1825.».