1. Antonello, E., Mantegazza, L., & Poretti, E. 1986, A&A
2. Balona, L. A. 2000a, in Delta Scuti and Related Stars, ed. M. Breger, & M. H. Montgomery, ASP Conf. Ser., 210, 170
3. Mode identification using equivalent width variation of Balmer lines
4. Breger, M. 2000, in Delta Scuti and Related Stars, ed. M. Breger, & M. H. Montgomery, ASP Conf. Ser., 210, 3