Send the following on WhatsApp
Continue to Chathttps://123dok.org/document/q2n61g8j-hyperbolic-parabolic-singular-perturbation-degenerate-kirchhoff-equations-estimates.html
https://123dok.org/document/q2n61g8j-hyperbolic-parabolic-singular-perturbation-degenerate-kirchhoff-equations-estimates.html