Nikolaos Dimakis Georgios Gkekas Ghassan Karame Theofilos Karachristos Stamatis Tsolakidis John Soldatos Lazaros Polymenakos Facilitating human-centric service delivery using a pluggable service development framework. 223-236 2009 4 IJAHUC 3/4 http://dx.doi.org/10.1504/IJAHUC.2009.024525 db/journals/ijahuc/ijahuc4.html#DimakisGKKTSP09