@article {16366, title = {Reliability considerations for process network synthesis problems}, journal = {CENTRAL EUROPEAN JOURNAL OF OPERATIONS RESEARCH}, volume = {22?}, year = {2013}, issn = {1435-246X}, author = {Cs. Holl{\'o}} } @article {HII09, title = {Reduction techniques for the {PNS} problems: a novel technique and a review}, journal = {Optimization and Engineering}, volume = {10}, number = {3}, year = {2009}, pages = {351-361}, author = {Cs. Holl{\'o} and B. Imreh and Cs. Imreh} }