@book(lv,
 author       = "M. Li\ \& P. Vit\'anyi",
 year         = "2008",
 title        = "{An introduction to Kolmogorov complexity and its applications}",
 publisher    = "3rd ed., Springer-Verlag, New York",
)
@article(mvyugin,
 author       = "M. Vyugin",
 year         = "2002",
 title        = "{Information distances and conditional complexities}",
 journal      = "Theoretical Computer Science",
 volume       = "271(1--2)",
 pages        = "145--150",
 doi          = "10.1016/S0304-3975(01)00037-8",
)
@article(muchnik,
 author       = "An. A. Muchnik",
 year         = "2002",
 title        = "{Conditional complexity and codes}",
 journal      = "Theoretical Computer Science",
 volume       = "271(1--2)",
 pages        = "97--109",
 doi          = "10.1016/S0304-3975(01)00033-0",
)