1. Kiss L.L., Csák B., Thomson J., Vinkó J.: 1999, V2109 Cygni, a second overtone field RR Lyrae star, Astronomy & Astrophysics, in press
II. Kiss L.L., Csák B., Thomson J., Szatmáry K.: 1999, DX Ceti, a high-amplitude d Scuti star, Information Bulletin on Variable Stars, No 4660