Kivioja T, Vähärautio A, Karlsson K, Bonke M, Enge M, Linnarsson S, Taipale J.

Nat Methods. 2011 Nov 20;9(1):72-4. doi: 10.1038/nmeth.1778.

Counting absolute numbers of molecules using unique molecular identifiers.

Random identifiers like in iCLIP (PMID 20601959)