A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007

Slashes
Spelling
Part III. Style 20 spelling

The forward slash is used in a few contexts, such as fractions (see 23.1.3) and quotations of poetry (see 25.2.1). Single and double slashes, as well as backward slashes, appear in URLs and other electronic identifiers (see 20.4.2).