00411nas a2200133   4500000000100000000000100001008004100002260005600043100002000099700002100119700001800140245010700158300001200265       2017                            d  bSpringer International PublishingaCham, Switzerlad1 aLachezar Petrov1 aNikolai Stoianov1 aTodor Tagarev00aCritical Information Infrastructure Protection Model and Methodology, Based on National and NATO Study  a350-357