@inproceedings{amn11,
author = "C. Andr{\'e}s and M. G. Merayo and {M.} {N}{\'u}{\~n}ez",
title = "{C}ollective {H}ierarchical st{U}dy proce{S}s",
booktitle ="International Conference on Data Engineering and Internet Technology, DEIT'11",
publisher = "IEEE Computer Society Press",
pages= "647--650",
year= "2011"}