@article{700396,
     title = {Uniqueness/nonuniqueness for nonnegative solutions of a class of second-order parabolic equations},
     booktitle = {Proceedings of Equadiff 11},
     series = {GDML\_Books},
     publisher = {Comenius University Press},
     address = {Bratislava},
     year = {2007},
     pages = {67-76},
     url = {http://dml.mathdoc.fr/item/700396}
}

Engländer, J.; Pinsky, R. G. Uniqueness/nonuniqueness for nonnegative solutions of a class of second-order parabolic equations, dans Proceedings of Equadiff 11, GDML_Books,  (2007), pp. 67-76. http://gdmltest.u-ga.fr/item/700396/