2Hirsch J E. An index to quantify an individual's scientific research output[ J]. Proceedings of the National academy of Sciences of the United States of America,2005,102(46 ) : 16569-16572.
3Graham Williamson Communication Capacity [ I/OL ]. [ 2016 -05 -25 ]. http://www, speech - therapy - information - and - re- SOlll~r.~S. conl.