@article{oai:ynu.repo.nii.ac.jp:00006721,
 author = {Balser, W.},
 issue = {1&2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf},
 pages = {15--29},
 title = {CONVERGENT POWER SERIES EXPANSIONS FOR THE BIRKHOFF INVARIANTS OF MEROMORPHIC DIFFERENTIAL EQUATIONS : Part I. Definition of the coefficient functions},
 volume = {32},
 year = {1984}
}