"High performance integrated Prolog processor IPP", de S. Abe, T. Bandoh, S. Yamaguchi, K. Kurosawa y K. Kiriyama, junio de 1987, doi10.1145/30350.30362
"A Prolog processor based on a pattern matching memory abuelae", de Ian Robinson, 1986, doi10.1007/3-540-16492-8_73
"Performance and architectural evaluation of the PSI machine", de Kazuo Taki, Katzuto Nakajima, Hiroshi Nakashima y Morihiro Ikeda, noviembre de 1987, doi10.1145/36205.36195