The second link is for the pdf.
https://www.sciencedirect.com/science/article/pii/S1201971221007670
https://reader.elsevier.com/reader/sd/pii/S1201971221007670?token=B9F3365E5FF644C1CDDFF739663300A65C162EC7A9AC6F74AC92976264415438576065AAF266E2975B5EC151C9D066A9&originRegion=us-east-1&originCreation=20210929061436