@ARTICLE{
author={Yang Dandan,Dolinka Igor,Gould Victoria},
year={2019},
title={A group-theoretical interpretation of the word problem for free idempotent generated semigroups},
journal={ADVANCES IN MATHEMATICS},
volume={345},
number={},
pages={998-1041},
document_type={Article},
} 

@ARTICLE{
author={Yang Dandan,Dolinka Igor,Gould Victoria},
year={2015},
title={Free idempotent generated semigroups and endomorphism monoids of free G-acts},
journal={JOURNAL OF ALGEBRA},
volume={429},
number={},
pages={133-176},
document_type={Article},
}