?url_ver=Z39.88-2004&rft_id=10.3390%2Fijerph16060973&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Abuasad%2C+S.&rft.aulast=Abuasad&rft.aufirst=S.&rft.date=2019&rft.title=International+Journal+of+Environmental+Research+and+Public+Health&rft.atitle=Fractional+multi-step+differential+transformed+method+for+approximating+a+fractional+stochastic+sis+epidemic+model+with+imperfect+vaccination&rft.issue=6&rft.volume=16&rft.issn=16617827&rft.genre=article