Guidelines for ATC classification and DDD assignment, WHO Collaborating Centre for Drug Statistics Methodology, Guidelines for ATC classification and DDD assignment 2013. Oslo, lk 273-275, 2012. Veebiversioon (vaadatud 09.08.2013)
Guidelines for ATC classification and DDD assignment, WHO Collaborating Centre for Drug Statistics Methodology, Guidelines for ATC classification and DDD assignment 2013. Oslo, 2012. Veebiversioon (vaadatud 09.08.2013)