(influence of Laplace pressure) decreases, neglect of logarithmic contribution becomes fairly justified. As a result, Eq. (\[Integrated-1\]) conformably to the third stage of bubble growth can be written in the form of $$\label{Growth-Quadratic}
\frac{R^2}{2} + R_\sigma R = D s \zeta t\; .$$

Sievert’s Law
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Unlike the case of Henry’s law (Eq. (\[Dyn-Eq-Henry\])) solution of Eq. (\[Dyn-Eq\]) in general case is too cumbersome and, as we will ensure in the current section, when inequality (\[Strong-Zeta\]) is fulfilled, is even not necessary. Here we present solutions of this equation for two particular cases: $$\label{Small-R}
R \ll R_\sigma$$ – the first and the second stages and $$\label{Large-R}
R \gg R_c$$ – the second and the third stages. When strong inequality Eq. (\[Strong-Zeta\]) is fulfilled, these two cases cover the whole range $R \geq 2 R_c$ of regular growth of the bubble radius, and that is the reason why general solution of Eq. (\[Dyn-Eq\]) is not necessary for the system under consideration.

Let us begin with the case when inequality Eq. (\[Small-R\]) is fulfilled. In this case we can omit $1$ in comparison with $R_\sigma/R$ in the l. h. s. of Eq. (\[Dyn-Eq\]) and we can also omit $1$ in comparison with 