@article{oai:u-ryukyu.repo.nii.ac.jp:02001279,
 author = {Kato, Mitsuo and 加藤, 満生},
 issue = {33},
 journal = {琉球大学教育学部紀要 第一部・第二部},
 month = {Sep},
 note = {In this note we will show that the Appell's system of partial differential equations (F^4) is equivalent to a Pfaffian system. By this Pfaffian system, we obtain an example of reducible cases of (F^4) which is equivalent to a "symmetric" (F^1) (see 4.2).\nThe author thanks to professor Masaaki Yoshida for his valuable advices., 紀要論文},
 pages = {331--334},
 title = {A Pfaffian system of Appell's F4},
 year = {1988}
}