Mark Billinghurst Jerry Bowskill M. Jessop Jason Morphett Spatial Conferencing Using a Wearable Computer. 1999 3 Pers. Ubiquitous Comput. 1/2 db/journals/puc/puc3.html#BillinghurstBJM99 https://doi.org/10.1007/BF01305322 72-80