Chandra Nayak, S. 2020. A fireworks algorithm based Pi-Sigma neural network (FWA-PSNN) for modelling and forecasting chaotic crude oil price time series. EAI Endorsed Transactions on Energy Web. 7, 28 (Jan. 2020), e2. DOI:https://doi.org/10.4108/eai.13-7-2018.162803.