@article{CKK-ActaInformatica,
 author = {Ivana Černá and Mojmír Křetínský and 
Antonín Kučera},
 journal = {Acta Informatica},
 number = {3},
 pages = {233 - 256},
 title = {Comparing Expressibility of Normed {BPA} and {BPP}
Processes},
 volume = {36},
 year = {1999}
}