Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
work-to-rule [ˈwəːktəˈruːl] n (BRIT) "рабо́та по пра́вилам" (вид забасто́вочной борьбы́);
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.