?url_ver=Z39.88-2004&rft_id=10.1063%2F1.5121073&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=M.L.&rft.aulast=Sapini&rft.au=Sapini%2C+M.L.&rft.date=2019&rft.title=The+existence+of+chaos+in+stock+market+price%3A+An+investigation+using+BDS+test+and+close+returns+test&rft.issn=0094243X&rft.isbn=9780735418813&rft.genre=proceeding