@article{SF_1975__10_134126,
     author = {J. Yuan},
     title = {On the continuity of convolution.},
     journal = {Semigroup forum},
     pages = {367--372},
     publisher = {mathdoc},
     volume = {10},
     year = {1975},
     zbl = {0298.43002},
     url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134126/}
}