Reference:
 author: Ben Langmead and Cole Trapnell and Mihai Pop and Steven L Salzberg 
 title: Ultrafast and memory-efficient alignment of short DNA sequences to the human genome
 journal: Genome Biology
 volume: 10
 pages: R25
 year: 2009
 DOI: 10.1186/gb-2009-10-3-r25
 URL: http://genomebiology.com/2009/10/3/R25
 eprint: http://genomebiology.com/content/pdf/gb-2009-10-3-r25.pdf