The computer code for this paper is available external to ModelDB:

"The models ... were written in Java programming language (Oracle
Corp) and simulated in an open-source webbased application developed
in the Eclipse IDE (The Eclipse Foundation). Model source code is
available for download at the website http://remoto.leb.usp.br/ and at
a public repository (http://dx.doi.org/10.6084/m9.figshare.1029085).