@article{10_4064_cm90_1_8,
     author = {Janusz Mierczy/nski},
     title = {The principal spectrum for linear
nonautonomous parabolic {PDEs} of second {order:
Space-independent} case},
     journal = {Colloquium Mathematicum},
     pages = {95--100},
     publisher = {mathdoc},
     volume = {90},
     number = {1},
     year = {2001},
     doi = {10.4064/cm90-1-8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm90-1-8/}
}