(1990). Nonlinear evolution equations that change type / Barbara Lee Keyfitz, Michael Shearer, editors.
Chicago-čujuhus (17. p.)Nonlinear Evolution Equations That Change Type / Barbara Lee Keyfitz, Michael Shearer, Editors. 1990.
MLA-čujuhus (9. p.)Nonlinear Evolution Equations That Change Type / Barbara Lee Keyfitz, Michael Shearer, Editors. 1990.
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