@article{oai:kanazawa-u.repo.nii.ac.jp:00011809,
 author = {下川, 弥吉 and Shimokawa, Yakichi},
 issue = {5},
 journal = {金沢大学工学部紀要 = Memoirs of the Faculty of Technology Kanazawa University},
 month = {Mar},
 note = {In this paper, the author tries to solve the nomographic charts of four complex variables which generalize the complex circular charts and to illustrate the accuracy of this method, some simple examples are shown.},
 pages = {1--8},
 title = {On the complex charts of four variables},
 volume = {3},
 year = {1965}
}