Normalised or unnormalised longitudinal field values of HD 66765, HD 67621, and the magnetic component of HD 109026 as a function of julian date. The best-fit solution is plotted with a full red line. For HD 66765 and HD 109029, the solution close to the 3σ level is plotted with a dashed-doted light-blue line. LSD V profiles are plotted for few observations centred on their Julian date. The V profiles have been shifted and/or multiply by a magnification factor for display purpose. The black profiles are associated with a similar phase according to our red fit, while the light-blue profiles are associated with a similar phase according to the blue fits.