The Polish doughnuts revisited - I. The angular momentum distribution and equipressure surfacesLei Qian, M. A. Abramowicz, P. C. Fragile, J. Horák, M. Machida and O. StraubA&A, 498 2 (2009) 471-477DOI: https://doi.org/10.1051/0004-6361/200811518
