Ó Corráin, Daithí ORCID: 0000-0003-2254-6322 and Hanley, Gerard (2022) Beginnings: early life, career, and the Gaelic League. In: Cathal Brugha: 'An Indomitable Spirit'. Four Courts Press, Dublin. ISBN 978-1-80151-017-2

Ó Corráin, Daithí ORCID: 0000-0003-2254-6322 and Hanley, Gerard (2022) Prologue to, Cathal Brugha: 'An Indomitable Spirit'. In: Cathal Brugha: 'An Indomitable Spirit'. Four Courts Press, Dublin, pp. 1-6. ISBN 978-1-80151-017-2

Hanley, Gerard (2020) Labour relations, government and trade unionism in independent Ireland, 1922-1946. PhD thesis, Dublin City University.