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2. Applications des potentiels á l’étude de l’équilibre et du mouvement îles solides élastique;Boussinesq,1885
3. Prototype load-bearing tests for foundations of structures and pavements;Burmister;ASTM STP,1963
4. Distribution of stresses under a foundation;Cummings;Trans. ASCE,1935
5. Osnovaniya, Fun- damenty i Mekhanika Gruntov;Evdokimov,1960