We consider uniqueness for the initial value problem x' = 1 + f(x) - f(t), x(0) = 0. Several uniqueness criteria are given as well as an example of non-uniqueness.
@article{bwmeta1.element.bwnjournal-article-apmv59z2p197bwm, author = {Gerd Herzog and Roland Lemmert}, title = {Remarks concerning Driver's equation}, journal = {Annales Polonici Mathematici}, volume = {60}, year = {1994}, pages = {197-202}, zbl = {0805.34003}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-apmv59z2p197bwm} }
Gerd Herzog; Roland Lemmert. Remarks concerning Driver's equation. Annales Polonici Mathematici, Tome 60 (1994) pp. 197-202. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-apmv59z2p197bwm/
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