  In this paper we report first results of our study on network characteristics
of a reference-based, bibliographically coupled (BC) publication network
structure. We find that this network of clustered publications shows different
topologies depending on the age of the references used for building the
network. A remarkable finding is that only the network structure based on all
references within publications is characterized by a degree distribution with a
power-law dependence. This topology, which is typical for scale-free networks,
disappears when selecting references of a specific age for the clustering
process. Structuring the publication network as a function of reference age,
allows 'tuning through the episodic memory' of the nodes of the network. We
find that the older the references, the more the network tends to change its
topology towards a Gaussian degree distribution.
