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   - [Tutorial Paper on New Methods for Estimating Psychological Networks](http://psych-networks.com/tutorial-paper-new-methods-estimating-psychological-networks/).
 -   [(Psychological) Network Analysis Workshops](http://eiko-fried.com/network-workshop/) - 3-day workshop on psychological network analysis using R.
 -   [Should I do Social Network Analysis?](https://cvcedhlab.hypotheses.org/125).
+-   [The Small World of Psychopathology](http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0027407) - Paper on how psychiatric symptoms connec to each other ([code, data and graphs](https://sites.google.com/site/dsmgraphs/Home/files)).
 -   [Social Network Analysis in DBpedia](http://othes.univie.ac.at/12285/1/2010-10-14_0703857.pdf) - Highly didactic Master’s dissertation, showing how to use SPARQL and Pajek.
 -   [SNA-DE Mailing-List](https://dlist.server.uni-frankfurt.de/mailman/listinfo/sna-de), in German.
 -   [SPARQL for R Tutorial - Hollywood Social Network Analysis](http://semanticweb.cs.vu.nl/R/sparql_hollywood/sparql_hollywood.html) - Also uses Gephi.