@article {HBI99,
	title = {On a Merging Reduction of the Process Network Synthesis Problem},
	journal = {Acta Cybernetica},
	volume = {14},
	year = {1999},
	pages = {251-261},
	author = {Cs. Holl{\'o} and Z. Bl{\'a}zsik and Cs. Imreh and Z. Kov{\'a}cs}
}
