@ARTICLE{publication1, title = "Hedgehog frames and a cardinal extension of normality", author = "{GUTI{\'{E}}RREZ GARC{\'{I}}A, Javier} and {MOZO CAROLLO, Imanol} and {PICADO, Jorge} and {WALTERS-WAYLAND, Joanne}", year = "2019", abstract = " ", journal = "Journal of Pure and Applied Algebra", volume = "223", number = "6", pages = "2345-2370" }