7Brown C H. Scientific characteristics and list of mest cited publication mathematics, physics, chemistry, geology, physiology, botany,zoology and entomology. ACRL Monograph, No. 16, Chicago Association of College and Research Libraries,1956.
8Clack K E. America's psychologists: a survey of a growing profession. Washington D C: American Psychological Association, 1957.
9Dhalig R L. Shannong information theory:the spread of an idea, in studies of innovation and of communication to the public. Polo Alto: Stanford University, Institute for Communication Research, 1962.
10Taglicacozzo R. Citations and citation indexs. A Review, Meth Inf Med, 1967,6(3) :136 -142.