Home People Research Group Engel Publications Books Books 2012 All years 2025 2020 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1998 1996 1995 1994 1993 1992 1991 1990 1989 1988 All genres Book (1) Book (1) 2012 Book Engel, C., & Schweizer, U. (Eds.). (2012). Testing Contracts, 168, 208 p. Mohr Siebeck MPG.PuRe