Acoustic oscillations in the field-free, gravitationally stratified cavities under solar bipolar magnetic canopiesD. Kuridze, T. V. Zaqarashvili, B. M. Shergelashvili and S. PoedtsA&A, 505 2 (2009) 763-770DOI: https://doi.org/10.1051/0004-6361/200811484
