RT Article T1 State weakness and regional security instability: evidence from Africa’s Lake Chad region JF International journal of conflict and violence VO 13 SP 1 OP 13 A1 Obamamoye, Babatunde F. LA English YR 2019 UL https://krimdok.uni-tuebingen.de/Record/1586507966 K1 State weakness K1 Regions K1 Security instability K1 Lake Chad region K1 Nigeria DO 10.4119/UNIBI/ijcv.639