@techreport{BittracherSchuette2020, author = {Andreas Bittracher and Christof Sch{\"u}tte}, title = {A probabilistic algorithm for aggregating vastly undersampled large Markov chains}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {20-21}, language = {eng}, year = {2020} }