Periodic parabolic problems with nonlinearities indefinite in sign

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T. Godoy
U. Kaufmann

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Godoy, T.; and Kaufmann, U. “Periodic parabolic problems with nonlinearities indefinite in sign”. Publicacions Matemàtiques, vol.VOL 51, no. 1, pp. 45-57, https://raco.cat/index.php/PublicacionsMatematiques/article/view/218482.