1 Subjects: “...European welfare states...”

2 Subjects: “...European welfare states...”

3 Subjects: “...state-of-the-art...”

4 Subjects: “...channel state information...”

5 Subjects: “...operating state...”

6 Subjects: “...state support measures...”

7 Subjects: “...augmented state Kalman filtering (ASKF)...”

8 Subjects: “...fuzzy stationary state...”

9 Subjects: “...state-owned companies...”