R. Cole. 24th Australiasian Computer Science Conference, том 23 из Australian Computer Science Communications, стр. 47-53. IEEE Computer Society, (2001)more details of this in Cole's PhD thesis.
R. Cole. 23th Australiasian Computer Science Conference, том 22 из Australian Computer Science Communications, стр. 47-53. IEEE Computer Society, (2000)more details of this in Cole's PhD thesis.