{{Cite journal| doi = 10.1007/s00013-019-01377-8| issn = 0003-889X, 1420-8938| volume = 114| issue = 2| pages = 185–193| last1 = Horsin| first1 = Thierry| last2 = Jendoubi| first2 = Mohamed Ali| title = Non-genericity of initial data with punctual $$\omega $$-limit set| journal = Archiv der Mathematik| access-date = 2020-09-18| date = 2020-02| url = http://link.springer.com/10.1007/s00013-019-01377-8}}