TY  - BOOK
AU  - Erugin,N.P.
TI  - Linear systems of ordinary differential equations: with periodic and quasi-periodic coefficients 
T2  - Mathematics in science and engineering
PY  - 1966///
CY  - New York
PB  - Academic Press
KW  - Differential equations, Linear
N1  - Bibliography : p. 262-269
ER  -