| 22 May 1922: The Forcible Hair Cutting of the Cullen Sisters of Keenaghan, Co. Tyrone : Gendered Violence Against Women | McAuliffe, Mary | Article in Book | | 2022 |
| Dungiven's Cullen/O'Neill dynasty | Hasson, Seamus | Article in Journal | | 2013 |
| Los Cullen Irlandeses en Canarias y la Argentina | Sánchez Falcón, Emilia | Article in Journal | | 1964 |
| Nineteenth century education in the Drogheda area : a family case study | McCullen, John | Article in Book | | 2023 |
| Other Cullen tombstones | Mac Suibhne, Peadar | Article in Journal | | 1958 |
| The Cullen family | Cullen, Sean | Article in Journal | | 2013 |
| The earlier Cullen tombstone | Curran, M. J. | Article in Journal | | 1955 |
| The early Cullen family | Mac Suibhne, Peadar | Article in Journal | | 1958 |
| The Sligo-Leitrim world of Kate Cullen (1832-1913) : a 19th century memoir revealed | Pyle, Hilary | Monograph or Collective Volume | Woodfield Press | 1997 |