@article{05829213,
title = {A generalization of a Cullen's integral theorem for the quaternions.},
journal = {Bolet\'\i n de la Asociaci\'on Matem\'atica Venezolana},
volume = {16},
year = {2009},
pages = {5-9},
zbl = {1206.30065},
language = {en},
url = {http://dml.mathdoc.fr/item/05829213}
}
Alayón-Solarz, Daniel. A generalization of a Cullen's integral theorem for the quaternions.. Boletín de la Asociación Matemática Venezolana, Tome 16 (2009) pp. 5-9. http://gdmltest.u-ga.fr/item/05829213/