@article{10.1109/SPLC.2011.13,
author = {Andy J. Nolan, and Paul C. Clements, and Andy Pickard, and Silvia Abrahão, },
title = {Requirements Uncertainty in a Software Product Line},
journal = {Software Product Line Conference, International},
volume = {00},
number = {},
issn = {},
year = {2011},
pages = {223-231},
doi = {doi.ieeecomputersociety.org/10.1109/SPLC.2011.13},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
}