Kristensson, G. (2010). Second order differential equations: Special functions and their classification. Springer Science + Business Media LLC.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kristensson, Gerhard. Second Order Differential Equations: Special Functions and Their Classification. New York: Springer Science + Business Media LLC, 2010.
Παραπομπή σε μορφή MLA (9th εκδ.)Kristensson, Gerhard. Second Order Differential Equations: Special Functions and Their Classification. Springer Science + Business Media LLC, 2010.
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