TY  - DATA
AU  - Barbara L. Keyfitz, Michael Shearer
TI  - Nonlinear Evolution Equations That Change Type
SN  - 9781461390497
PY  - 1990///
PB  - Springer New York
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/978-1-4613-9049-7
ER  -