Linsky J L, Ayres T R, Basri G S, Morrison N D, Boggess A, Schiffer, F. H. III, Holm A, Cassatella A, Heck A, Macchetto F, et al. IUE observations of cool stars : alf Aur, HR 1099, lam and EPS Eri. \nat. 1978;275 :389-394.