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Dyfyniad Arddull ChicagoV.S Vladimirov. A Collection of Problem On the Equations of Mathematical Physics. In lần thứ 1. Maxcơva: Moscow, 1986.
Dyfyniad MLAV.S Vladimirov. A Collection of Problem On the Equations of Mathematical Physics. In lần thứ 1. Maxcơva: Moscow, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.