Shtokalo, I.Z.
Linear differential equations with variable coefficients criteria of stability and unstability of their solutions - New Delhi Hindustan Publishing Corpn. 1961 - 100 - International monographs series .
517.968 SHT
Linear differential equations with variable coefficients criteria of stability and unstability of their solutions - New Delhi Hindustan Publishing Corpn. 1961 - 100 - International monographs series .
517.968 SHT