Carbonell, M.; Oliver, R.; Ballester, J. L., "On the asymmetry of solar activity", "Astronomy and Astrophysics", Volume 274, Pages 497-504, 1993. Paper.
Oliver, R.; Ballester, J. L.; Hood, A. W.; Priest, E. R., "Oscillations of a quiescent solar prominence embedded in a hot corona", "The Astrophysical Journal", Volume 409, Pages 809-821, 1993. Paper.
Oliver, R.; Ballester, J. L.; Hood, A. W.; Priest, E. R., "Magnetohydrodynamic waves in a potential coronal arcade", "Astronomy and Astrophysics", Volume 273, Pages 647-658, 1993. Paper.