This is a long summary article on ideas, attitudes, social structures, and legal principles relating to women’s sexuality in medieval Europe. Only a very small section is at all relevant to same-sex sexuality, and that is in a section entitled “Continued Silences” so you can already guess how scanty it’s likely to be, especially given that the “silence” it refers to is women’s own writings about sexuality in general, not specifically same-sex experiences. (It’s always useful to take note of the publication date of articles like this.