Papers that discuss Stellar Dynamics Software can be found in: If you must acknowledge the use of NEMO, or want to refer to a publication, this is the most current one:
Teuben, P.J. The Stellar Dynamics Toolbox NEMO, in: 
Astronomical Data Analysis Software and Systems IV, 
ed. R. Shaw, H.E. Payne and J.J.E. Hayes. (1995),
PASP Conf Series 77, p398.