@phdthesis{Dybvig:phd,
author = {R. Kent Dybvig},
title = {Three Implementation Models for Scheme},
school = {University of North Carolina},
address = {Chapel Hill},
month = apr,
year = 1987,
texturl = "http://www.cs.indiana.edu/~dyb/pubs/3imp.pdf",
annote = {Chapter 4 describes the essence of the
Chez Scheme Version~1 run-time architecture.}}