Ref is:
https://www.jstor.org/stable/1392045?seq=1#metadata_info_tab_contents
Frédérique Bec; Mélika Ben Salem; Marine Carrasco (2004) Tests for Unit-Root versus Threshold Specification With an Application to the, Journal of Business & Economic Statistics; Oct 2004; 22, 4; ABI/INFORM Global
Ref is: https://www.jstor.org/stable/1392045?seq=1#metadata_info_tab_contents Frédérique Bec; Mélika Ben Salem; Marine Carrasco (2004) Tests for Unit-Root versus Threshold Specification With an Application to the, Journal of Business & Economic Statistics; Oct 2004; 22, 4; ABI/INFORM Global