Jiménez-Mejías, Pedro; Luceño, Modesto; Wilson, Karen L.; Waterway, Marcia J.; Roalson, Eric H. (1 September 2016). "Clarification of the Use of the Terms Perigynium and Utricle in Carex L. (Cyperaceae)". Systematic Botany. 41 (3): 519–528. Bibcode:2016SysBo..41..519J. doi:10.1600/036364416X692488. S2CID89281001.
Jiménez-Mejías, Pedro; Luceño, Modesto; Wilson, Karen L.; Waterway, Marcia J.; Roalson, Eric H. (1 September 2016). "Clarification of the Use of the Terms Perigynium and Utricle in Carex L. (Cyperaceae)". Systematic Botany. 41 (3): 519–528. Bibcode:2016SysBo..41..519J. doi:10.1600/036364416X692488. S2CID89281001.
Jiménez-Mejías, Pedro; Luceño, Modesto; Wilson, Karen L.; Waterway, Marcia J.; Roalson, Eric H. (1 September 2016). "Clarification of the Use of the Terms Perigynium and Utricle in Carex L. (Cyperaceae)". Systematic Botany. 41 (3): 519–528. Bibcode:2016SysBo..41..519J. doi:10.1600/036364416X692488. S2CID89281001.