Akimov, P.A. and Negrozov, O.A. 2018. ABOUT SOLUTION OF MULTIPOINT BOUNDARY PROBLEMS OF THREE-DIMENSIONAL STRUCTURAL ANALYSIS WITH THE USE OF COMBINED APPLICATION OF FINITE ELEMENT METHOD AND DISCRETE-CONTINUAL FINITE ELEMENT METHOD. PART 1: FORMULATION AND BASIC PRINCIPLES OF APPROXIMATION. International Journal for Computational Civil and Structural Engineering. 14, 2 (Jun. 2018), 14–29. DOI:https://doi.org/10.22337/2587-9618-2018-14-2-14-29.