Equator-Pole Temperature Difference and the Solar OblatenessDOI: info:10.1007/BF00152303v. 28343–345
Noyes, R. W., Ayres, T. R., and Hall, D. N. B. 1973. "Equator-Pole Temperature Difference and the Solar Oblateness." Solar Physics, 28 343–345. https://doi.org/10.1007/BF00152303.