1. W.E. Boyce, R.C. DiPrima, Elementary Differential Equations and Boundary Value Problems, 5th ed., Wiley, New York, 1992, xv, 680, pp. 1–7
2. C.C. Chicone, Ordinary Differential Equations with Applications. Texts in Applied Mathematics, vol. 34, Springer, New York, 1999, xv, p. 561
3. P. Henrici, Applied and Computational Complex Analysis, vol. 1, Wiley, New York, 1974
4. Cryopreservation of umbilical cord blood: 2. Tolerance of cd34(+) cells to multimolar dimethyl sulphoxide and the effect of cooling rate on recovery after freezing and thawing;Hunt;Cryobiology,2003
5. The simultaneous measurement of cell permeability to water and to dissolved substances;Jacobs;J. Cell. Comp. Physiol.,1932