@article{DBLP:journals/jflp/NaishS00,
author = {Lee Naish and
Leon Sterling},
title = {Stepwise Enhancement and Higher-Order Programming in Prolog},
journal = {Journal of Functional and Logic Programming},
volume = {2000},
number = {4},
year = {2000},
bibsource = {DBLP, http://dblp.uni-trier.de}
}