Schäfer, B. M., & Koyama, K. (2008). Spherical collapse in modified gravity with the Birkhoff theorem. Monthly notices of the Royal Astronomical Society, 385(1), . https://doi.org/10.1111/j.1365-2966.2008.12841.x
Chicago Style (17th ed.) CitationSchäfer, Björn Malte, and Kazuya Koyama. "Spherical Collapse in Modified Gravity with the Birkhoff Theorem." Monthly Notices of the Royal Astronomical Society 385, no. 1 (2008). https://doi.org/10.1111/j.1365-2966.2008.12841.x.
MLA (9th ed.) CitationSchäfer, Björn Malte, and Kazuya Koyama. "Spherical Collapse in Modified Gravity with the Birkhoff Theorem." Monthly Notices of the Royal Astronomical Society, vol. 385, no. 1, 2008, https://doi.org/10.1111/j.1365-2966.2008.12841.x.
Warning: These citations may not always be 100% accurate.