8[1]REMI Arnaud.Developing Web Applications with COLLADA and X3D[EB/OL].(2007-03)[2007-04].http://www.web3d.org/.
9[2]LUCA Chittaro,ROBERTO Ranon.Web3D technologies in learning,education and training:Motivations,issues,opportunities[J].Computers & Education,2007(8):3-18.