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Analysis of the radial-velocity and light curves of detached eclipsing binaries allows to derive stellar masses and radii and, in consequence, enables to find their distances. This method has been already applied to several LMC binaries, but in order to have the distance to the LMC determined with good accuracy, the study needs to be extended to a larger number of eclipsing systems. As a first step,...
We present results of an investigation of the long-term variations of the amplitudes of the three strongest modes of 16 (EN) Lac and of the period of the strongest mode of ν Eri. We show that in the case of the first star there are feasible explanations of the observed variations. The explanations involve non-linear interaction between pulsation modes (the first two observed modes) and beating between...
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