Rupert Hölzl Thorsten Kräling Wolfgang Merkle Time-Bounded Kolmogorov Complexity and Solovay Functions. 392-402 2009 MFCS http://dx.doi.org/10.1007/978-3-642-03816-7_34 conf/mfcs/2009 db/conf/mfcs/mfcs2009.html#HolzlKM09