If you wish to include style sheets in your website, please use the form <link rel="stylesheet" type="text/css" href="styles.css">. This causes the links used to be added to the link management. Furthermore, it is important to specify the title tag attribute and use the same title for all the style sheets in a set. This makes it possible for the browser to offer a set of styles under a unique title. Example:
<link rel="stylesheet" type="text/css" href="typo.css" media="screen" title="Standard" /> <link rel="stylesheet" type="text/css" href="navi.css" media="screen" title="Standard" />