TY - BOOK ED - Safety-Critical Systems Symposium ( 1 ; 1993 ; Bristil ) TI - Directions in safety-critical systems proceedings on the first Safety-Critical Systems Symposium the Watershed Media Centre, Bristil, 9-11 February 1993 SN - 0-387-19817-2; 3-540-19817-2 CY - New York; Berlin; Heidelberg KW - simpozion AV - III 13329 ER -