Kostas S. Metaxiotis John E. Psarras Dimitris Askounis Building ontologies for production scheduling systems: towards a unified methodology. 44-51 2001 9 Inf. Manag. Comput. Security 1 http://juno.emeraldinsight.com/vl=1677626/cl=88/nw=1/rpsv/cgi-bin/linker?ini=emerald&reqidx=/cw/mcb/09685227/v9n1/s6/p44 db/journals/imcs/imcs9.html#MetaxiotisPA01