@article{10_4064_cm95_2_9,
     author = {Grzegorz {\L}ysik},
     title = {Nonanalyticity of solutions to $\partial _{t}u=\partial _{x}^2u+u^2$},
     journal = {Colloquium Mathematicum},
     pages = {255--266},
     publisher = {mathdoc},
     volume = {95},
     number = {2},
     year = {2003},
     doi = {10.4064/cm95-2-9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm95-2-9/}
}