@article{10_4064_cm_54_2_267_271,
     author = {Jan Stochel},
     title = {On the {Sz.-Nagy} boundedness condition on abelian involution semigroups},
     journal = {Colloquium Mathematicum},
     pages = {267--271},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {1987},
     doi = {10.4064/cm-54-2-267-271},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-54-2-267-271/}
}