Indirect evidence di dalam pembuktian perkara persaingan usaha di KPPU : studi kasus putusan No. 24/KPPU-I/2009 dan putusan No. 03/KPPU/PN.JKT.PST = Indirect evidence in authentication of business competition case at KPPU : case study verdict No. 24/KPPU-I/2009 and verdict No. 03/KPPU/PN.JKT.PST (Fakultas Hukum Universitas Indonesia, 2011)