PIMENTEL, David M. Towards a typology of classificatory change. In: Richard P. SMIRAGLIA, ed. Proceedings from North American Symposium on Knowledge Organization [held at Ryerson University in Toronto Canada on June 16-17, 2011]. Vol. 3 [online]. 2011, s. 139-150 [cit. 2013-07-22].
Dostupný volně z repozitáře: http://journals.lib.washington.edu/index.php/nasko/article/view/12789 nebo http://journals.lib.washington.edu/index.php/nasko/article/view/12798/11279.