Logos for amino acid preferences in different backbone packing density regions of protein structural classes

@article{Kannan.Vishveshwara2000,
author = "N. Kannan
 and T. D. Schneider
 and S. Vishveshwara",
title = "Logos for amino acid preferences in different backbone packing
density regions of protein structural classes",
journal = "Acta Crystallographica Section D",
volume = "56",
part = "9",
pages = "1156-1165",
year = "2000"}