I have started working on viscoelasticity (with very limited background) and our preferable model in this study is Giesekus. We have Capillary Rheometer and Rotational Viscometer accessible in the lab. For the Capillary test, single swell point measurement is also available. What other tests may be needed to fit the parameters of the model (we have very limited budgets). Furthermore, how can I fit the data? I appreciate a good reference (book/article).