 Scholars such as Professor Birks and Professor Burrows argue that in many cases the inclusion of the label "legal" or "equitable" before a substantive rule is often unnecessary.Many English universities, such as Oxford and Cambridge, continue to teach Equity as a standalone subject.Leading practitioner texts include "Snell's Equity", "Lewin on Trusts", and "Hayton & Underhill's Law of Trusts and Trustees".