Hi Troels, I've noticed that in a number of places you have referred to the TSMFK01 model as the "Tollinger, Kay et al. (2001)" model. This notation is incorrect as Lewis Kay is the last of 5 authors and not the second. You can call it the Tollinger et al. (2001) model though. I would recommend this change as the user will see this often - after selecting the model through relax_disp.select model, when looking at the manual, and when looking at the user function documentation. There are 3 additional places in the code where this text can be found (grep can find the 6 instances). Though the user will not see these, they should probably all be changed. Cheers, Edward