no. 2
Non-uniqueness of solutions of nonlinear heat equations of fast diffusion type
Annales de l'I.H.P. Analyse non linéaire, Tome 12 (1995) no. 2, pp. 173-200 
@article{AIHPC_1995__12_2_173_0,
     author = {Rodriguez, Ana and Vazquez, Juan Luis},
     title = {Non-uniqueness of solutions of nonlinear heat equations of fast diffusion type},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {173--200},
     year = {1995},
     publisher = {Gauthier-Villars},
     volume = {12},
     number = {2},
     mrnumber = {1326667},
     zbl = {0837.35077},
     language = {en},
     url = {https://www.numdam.org/item/AIHPC_1995__12_2_173_0/}
}
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Rodriguez, Ana; Vazquez, Juan Luis. Non-uniqueness of solutions of nonlinear heat equations of fast diffusion type. Annales de l'I.H.P. Analyse non linéaire, Tome 12 (1995) no. 2, pp. 173-200. https://www.numdam.org/item/AIHPC_1995__12_2_173_0/

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