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How valid can data fusion be?
Kiesl, Hans, (2006)
Theoretische und empirische Analysen zum Geldangebot in der Bundesrepublik Deutschland
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Elements of statistical analysis
Gottinger, Hans Werner, (1980)
Means and variances of time averages in Markovian environments
Grassmann, Winfried, (1987)
Transient solutions in Markovian queues : An algorithm for finding them and determining their waiting-time distributions
Grassmann, Winfried, (1977)