Technical maintenance is currently undergoing. During this time, the platforms zurnalai.vu.lt and journals.vu.lt may be temporarily unavailable between 12:00 (noon) and 12:00 (noon) the following day (GMT+3).
Birštunas, A. and Norgėla, S. (2003) “Inverse method for modal logic S4”, Lietuvos matematikos rinkinys, 43(spec.), pp. 429–433. doi:10.15388/LMR.2003.32470.