Request for references on interface inheritance  Hi Am I glad that you left information in interface inheritance on your talk page I was trying to remember who helped clarify the stub even though your last reply was posted more than a year ago The What links here was very helpful in this regard  A pair of  challenges have been made against the stub do you know of any good reference material to address the challenges  Also in your previous reply you had mentioned the need for concrete examples do you know of any reputable sources for such information Cheers