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Incumbents und ihre Preisstrategien im Telefondienst : ein internationaler Vergleich
Schäfer, Ralf G., (2006)
AT&T's strategic response to competition : why not preempt entry?
Nix, Joan, (1993)
Continuing confusion : entry prices in telecommunications
Temin, Peter, (2004)
Consolidated accounting information for business group management
Takano, Manabu, (2010)