@article{10_4153_CJM_1981_008_0,
     author = {Takahasi, Sin-Ei},
     title = {On {The} {Center} {Of} {Quasi-Central} {Banach} {Algebras} {With} bounded {Approximate} {Identity}},
     journal = {Canadian journal of mathematics},
     pages = {68--90},
     year = {1981},
     volume = {33},
     number = {1},
     doi = {10.4153/CJM-1981-008-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1981-008-0/}
}