Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ofuji Kenta and Tatsumi Naoki,A Count Model Analysis of the Traded Contracts in JEPX Forward Market,IEEJ Transactions on Power and Energy,03854213,The Institute of Electrical Engineers of Japan,2013,133,10,770-776,https://cir.nii.ac.jp/crid/1390282679579760896,https://doi.org/10.1541/ieejpes.133.770