Dyfyniad APA
Egorov, I. V. (1986). Linear differential equations of principal type. Consultants Bureau.
Dyfyniad Arddull Chicago
Egorov, I︠U︡. V. Linear Differential Equations of Principal Type. New York ; London: Consultants Bureau, 1986.
Dyfyniad MLA
Egorov, I︠U︡. V. Linear Differential Equations of Principal Type. Consultants Bureau, 1986.
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