@misc{Kozakiewicz_Adam_RTT+,
 author={Kozakiewicz, Adam and Felkner, Anna},
 howpublished={online},
 publisher={Instytut Łączności - Państwowy Instytut Badawczy, Warszawa},
 language={ang},
 title={RTT+ – Time Validity Constraints in RT RTT Language, Journal of Telecommunications and Information Technology, 2012, nr 2},
 type={artykuł},
 keywords={set-theoretic semantics, access control, role-based trust management, logic-programming semantics, inference system with time constraints},
}