1 | | Differential equations and dynamical systems / Lawrence Perko . - 2nd ed. - Boca Raton : Chapman & Hall/CRC, 2008. - xxxiii, 1108 p. : ill. ; 27 cm. - ( Handbooks of mathematical equations ) Mã xếp giá: 515.45 P76Đăng ký cá biệt: Lầu 2 KLF: 2000007483 |