<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Marshall, Catherine C.</hi> (1998) „Toward an ecology of hypertext annotation", in: <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Proceedings of the ninth ACM conference on Hypertext and hypermedia</hi>: links, objects, time and space —structure in hypermedia systems 40-49.