@article{SF_1996__53_2_135499,
     author = {R. de Laubenfels and F. Yao},
     title = {Regularized semigroups of bounded semivariation.},
     journal = {Semigroup forum},
     pages = {369--383},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1996},
     zbl = {0859.47028},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__53_2_135499/}
}