@article{10_4064_cm122_1_11,
     author = {Piotr Biler and Tadeusz Nadzieja},
     title = {An elementary approach to nonexistence
 of solutions of linear parabolic equations},
     journal = {Colloquium Mathematicum},
     pages = {125--134},
     publisher = {mathdoc},
     volume = {122},
     number = {1},
     year = {2011},
     doi = {10.4064/cm122-1-11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm122-1-11/}
}