Schutz, Bernard F. Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
APJ232.pdf (Publisher version), 620KB
Schutz, B. F. (1979). General Variational Principle for Normal Modes of Rotating Stars. Astrophysical Journal, 232(3), 874-877. doi:10.1086/157348.