@article{articlef586c284,
title   = {Achieving optimality for gate matrix layout and pla folding: a graph theoretic approach},
author = {Ferreira, Afonso Galvão and Song, Siang Wun},
year = {1992},
doi = {10.1016/0167-9260(92)90025-t},
journal   = {Integration: the V L S I journal}
}