@article{article77f8fc87,
title   = {Validation of reverse circulation drilling rig for reconciliation purposes},
author = {Chieregati, Ana Carolina and El Hajj, Thammiris Mohamad and Imoto, Carla Fernanda and Pignatari, Luiz Eduardo Campos},
year = {2015},
doi = {10.1255/tosf.58},
journal   = {TOS Forum}
}