Spruit, H. C. High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Schnerr, R. S., & Spruit, H. C. (2011). The total solar irradiance and small scale magnetic fields. In J. R., Kuhn, D. M., Harrington, H., Lin, & S. V., Berdyugina (Eds.), Solar Polarization Workshop 6 (pp. 167-172).