Çetin, ErbilTopal, Fatma Serap2020-12-012020-12-0120151300-00981303-6149https://app.trdizin.gov.tr//makale/TVRjME1UTTBOQT09https://hdl.handle.net/11454/65477This work is concerned with the existence of positive solutions to a nonlinear nonlocal first-order multipoint problem. Here the nonlinearity is allowed to take on negative values, not only positive values.eninfo:eu-repo/semantics/openAccessMatematikExistence of solutions for a ?rst-order nonlocal boundary value problem with changing-sign nonlinearityArticle394556563