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q_0^2 = \frac{2 \, d \, A^2 }{f \, L} \cdot \left [ 
\Delta Z + ((\rho/\rho_0)^2 -1) \cdot  \frac{ \Delta Z}{1 - \exp(2 \, c_0 \, \rho_0 \, \Delta Z)}
\right]

\dot m^2 = \rho_0^2 \cdot \frac{2 \, d \, A^2 }{f \, L} \cdot \left [ 
\Delta Z + ((\rho/\rho_0)^2 -1) \cdot  \frac{ \Delta Z}{1 - \exp(2 \, c_0 \, \rho_0 \, \Delta Z)}
\right]

\rho = \rho_0 \, \exp (с_0 \, \rho_0 \, g \, \Delta Z) \cdot \sqrt{ 1 - \frac{f \, L}{2d2 \, d} \cdot \frac{q_0^2}{A^2} \cdot \frac{1 - \exp(- 2 \, c_0 \, \rho_0 \, g \, \Delta Z) } { g \, \Delta Z}}

p(L) = p_0 + \frac{\rho/\rho_0 -1}{c_0} 

\rho = \rho_0 \, \exp (c_0 \, \rho_0 \Delta Z)

p(L) =  p_0 + \frac{\exp (c_0 \, \rho_0 \Delta Z) -1}{c_0}