McDonough, Jerome; Olendorf, Robert; Kirschenbaum, Matthew; Kraus, Kari; Reside, Doug; Donahue, Rachel; Phelps, Andrew; Egert, Christopher; Lowood, Henry; Rojo, Susan (2010 m. rugpjūčio 31 d.). Preserving Virtual Worlds Final Report (Report). University of Illinois. p. 77. hdl:2142/17097. Nuoroda tikrinta November 3, 2020.
illinois.edu
ideals.illinois.edu
McDonough, Jerome; Olendorf, Robert; Kirschenbaum, Matthew; Kraus, Kari; Reside, Doug; Donahue, Rachel; Phelps, Andrew; Egert, Christopher; Lowood, Henry; Rojo, Susan (2010 m. rugpjūčio 31 d.). Preserving Virtual Worlds Final Report (Report). University of Illinois. p. 77. hdl:2142/17097. Nuoroda tikrinta November 3, 2020.