Asian option with comonotonic bounds

In this thesis we look into the comonotonic bounds of Asian option in a Black Scholes extended model for time-varying volatility and interest rates, as well as for a hybrid-Heston model using a double Cox-Ingersoll process for both the volatility and the interest rates. While we manage to compute the bounds, the interest rate process seems to lower their accuracy which leads to question on whether or not those bounds can be adapted to stochastic interest rate processes.