https://dds.las.ac.cn/service/book?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1730416486310&signature=67fea5419bae44148360346f01df2b7b&name=Ein+universelles+Konzept+zum+flexiblen+Informationsschutz+in+und+mit+rechensystemen&author=Dittrich%2C+Klaus+R.&publishYear=1983&isn=354012697X&publisher=Berlin+%3A+Springer%2C+1983.&destLibCode=311001&destLibName=中国科学院文献情报中心&agentLibCode=311001&agentLibName=中国科学院文献情报中心