[3] Eringen A. C.: 
Linear theory of micropolar elasticity. Journ. Math. Mech., 15 (1966), 6, 909-923. 
MR 0198744 | 
Zbl 0145.21302 
[4] Аэро Э. Л., Кувшинский Е. В.: 
Континуальная теория асимметрической упругости. Физ. TB. тела, 6 (1964), 9, 2689-2699. 
Zbl 1117.65300 
[5] Neuber H.: On the general solution of linear-elastic problems in isotropic and anisotropic Cosserat continua. Appl. Mech., Proc. 11-th intern, congress of appl. mech., Munich 1964.
[6] Mindlin R. D., Tiersten F. F.: 
Effects of couple-stresses in linear elasticity. Arch. Ratl. Mech. Anal., 11 (1962), 415-448. 
DOI 10.1007/BF00253946 | 
MR 0144513 
[7] Mindlin R. D., Eshel N. N.: 
On the first strain gradient theories in linear elasticity. Int. Journ. Solids and Struct., 4 (1968), 1, 75-95. 
DOI 10.1016/0020-7683(68)90036-X 
[10] Hlaváček M., Kopáčková M.: 
Theorems of the linear elastostatic Cosserat continuum for exterior domains. Zeit. f. angew. Math. Mech., 50 (1970), 5, 295-302. 
DOI 10.1002/zamm.19700500504 | 
MR 0267820 
[11] Hlaváček I., Hlaváček M.: 
On the existence and uniqueness of solution and some variational principles in linear theories of elasticity with couple-stresses. I - Cosserat continuum, II - Mindlin's elasticity with microstructure and the first strain-gradient theory, Aplikace matematiky 14 (1969), 5, 387-410, 411-426. 
MR 0250537 
[13] Zaremba S.: Sopra un teorema d'unicitá relative alla equazione delle onde sferiche. Atti della Reale Accad. dei Lincei, ser. 5, 24 (1915), 904.
[14] Kellogg O. D.: 
Foundations of potential theory. Berlin, Springer, 1929. 
MR 0222317