1977, S. Subrahmanyan, A critical study of TolkÄppiyam (el̲luttu and col.) and Nan̲n̲ūl‎, He also says that the change of older V to 'e' is reflected in the practice of using ligatureless consonantal symbols — a practice, dating back at least...
2008, Benjamin Elisha Dawson, Orificial Surgery; Its Philosophy, Application and Technique, ...ligatureless and comparatively bloodless vaginal hysterectomy can be done, how abdominal surgery can be done without leaving pinched tissues,...