Reference:
 Author: John C. Wootton and Scott Federhen
 Title: 'Statistics of local complexity in amino acid sequences and sequence databases.'
 Journal: 'Computers & Chemistry'
 Year: 1993
 Volume: 17
 Pages: 149-163
 DOI: 10.1016/0097-8485(93)85006-X
 URL: http://www.sciencedirect.com/science/article/pii/009784859385006X
