Kayadi, B., C. C. Opara, . C. T. Zwingina, and U. O. Efanga. “Co-Integration Approach to Analysing The Impact of External Debt Management on Economic Growth of Nigeria”. International Journal of Finance Research, vol. 2, no. 2, Sept. 2021, pp. 111 -28, doi:10.47747/ijfr.v2i2.336.