Aleksander Binemann-Zdanowicz Bernhard Thalheim Modeling Information Services on the Basis of ASM Semantics. 408-410 2003 conf/asm/2003 Abstract State Machines http://link.springer.de/link/service/series/0558/bibs/2589/25890408.htm db/conf/asm/asm2003.html#Binemann-ZdanowiczT03