@article{oai:ynu.repo.nii.ac.jp:00006978,
 author = {Yasukura, Osami},
 issue = {2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf, Ehresmann's theorem of quaternion holomorphy on quatemionic functions is generalized by considering quaternion differentiability equation and complex matrix reproeentation of quaternions.},
 pages = {163--170},
 title = {ON EHRESMANN'S THEOREM OF QUATERNION HOLOMORPHY},
 volume = {49},
 year = {2002}
}