Heller, René Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;
Heller, R., Jacob, R., Schönberner, D., & Steffen, M. (2018). Hot bubbles of planetary nebulae with hydrogen-deficient winds: II. Analytical approximations with application to BD + 30°3639. Astronomy and Astrophysics, 620: A98. doi:10.1051/0004-6361/201832683.