Remove "posted by author"

I managed to remove the author after adding this to custom CSS: .author { display: none; } But what I cant get rid of is the text "by". My blog is in swedish and "by" is translated to "av". Highly appreciated if someone could give me some pointers. Been searching in the theme php files but cant find the line to remove "by" from. You find the blog here: www.vegolyx.se Thanks!