\input zb-basic \input zb-ioport \iteman{io-port 06061715} \itemau{Ferreira, Fernando (ed.); L\"owe, Benedikt (ed.); Mayordomo, Elvira (ed.)} \itemti{Special issue: CiE: programs, proofs, processes. Selected papers based on the presentations at the 6th meeting CiE 2010, Ponta Delgada, Portugal, June 30 -- July 4, 2010.} \itemso{Theory Comput. Syst. 51, No. 3, 267-400 (2012).} \itemab The articles of this volume will be reviewed individually. For the preceding conference see Zbl 1250.03003; Zbl 1192.68004. \itemrv{~} \itemcc{} \itemut{} \itemli{} \end