G. Public, Gnu general public license, 2007.

A. Javili, F. Dell-'isola, and P. Steinmann, Geometrically nonlinear higher-gradient elasticity with energetic boundaries, Journal of the Mechanics and Physics of Solids, vol.61, issue.12, pp.2381-2401, 2013.
DOI : 10.1016/j.jmps.2013.06.005
URL : https://hal.archives-ouvertes.fr/hal-00838679

E. Jones, T. Oliphant, and P. Peterson, SciPy: Open source scientific tools for Python, 2001.

O. Kesler and L. J. Gibson, Size effects in metallic foam core sandwich beams, Materials Science and Engineering: A, vol.326, issue.2, pp.228-234, 2002.
DOI : 10.1016/S0921-5093(01)01487-3

H. P. Langanten and A. Logg, Solving PDEs in Python, of Simula SpringerBriefs on Computing, 2017.

A. Logg, K. A. Mardal, and G. N. Wells, Automated Solution of Differential Equations by the Finite Element Method the FEniCS Book, Lecture Notes in Computational Science and Engineering, vol.84, 2011.

R. D. Mindlin, Micro-structure in linear elasticity, Archive for Rational Mechanics and Analysis, vol.16, issue.1, pp.51-78, 1964.
DOI : 10.1007/BF00248490
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.612.9151

R. D. Mindlin, Second gradient of strain and surface-tension in linear elasticity, International Journal of Solids and Structures, vol.1, issue.4, pp.417-438, 1965.
DOI : 10.1016/0020-7683(65)90006-5

R. D. Mindlin and H. F. Tiersten, Effects of couple-stresses in linear elasticity, Archive for Rational Mechanics and Analysis, vol.190, issue.1, pp.415-448, 1962.
DOI : 10.1007/BF00253946

J. Morrison, The yield of mild steel with particular reference to the effect of size of specimen, Proc. Inst, pp.193-223, 1939.

P. Neff, I. Ghiba, A. Madeo, L. Placidi, and G. Rosi, A unifying perspective: the relaxed linear micromorphic continuum, Continuum Mechanics and Thermodynamics, vol.44, issue.1, pp.639-681, 2014.
DOI : 10.1016/j.ijengsci.2006.08.002
URL : https://hal.archives-ouvertes.fr/hal-01167202

T. E. Oliphant, Python for Scientific Computing, Computing in Science & Engineering, vol.9, issue.3, pp.10-20, 2007.
DOI : 10.1109/MCSE.2007.58
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.6460

C. Pideri and P. Seppecher, A homogenization result for elastic material reinforced periodically with high rigidity elastic fibres. Comptes Rendus de l, Academie des Sci. Ser. IIB Mech. Phys. Chem. Astron, vol.8, issue.324, pp.475-481, 1997.

L. Placidi, U. Andreaus, A. Della-corte, and T. Lekszycki, Gedanken experiments for the determination of two-dimensional linear second gradient elasticity coefficients, Zeitschrift für angewandte Mathematik und Physik, pp.3699-3725, 2015.
DOI : 10.1016/j.ijsolstr.2012.05.024

C. Polizzotto, A second strain gradient elasticity theory with second velocity gradient inertia ??? Part I: Constitutive equations and quasi-static behavior, International Journal of Solids and Structures, vol.50, issue.24, pp.3749-3765, 2013.
DOI : 10.1016/j.ijsolstr.2013.06.024

C. Polizzotto, A second strain gradient elasticity theory with second velocity gradient inertia ??? Part II: Dynamic behavior, International Journal of Solids and Structures, vol.50, issue.24, pp.3766-3777, 2013.
DOI : 10.1016/j.ijsolstr.2013.07.026

J. C. Reiher, I. Giorgio, and A. Bertram, Finite-Element Analysis of Polyhedra under Point and Line Forces in Second-Strain Gradient Elasticity, Journal of Engineering Mechanics, vol.143, issue.2, p.4016112, 2016.
DOI : 10.1061/(ASCE)EM.1943-7889.0001184

G. Romano, R. Barretta, and A. Barretta, On Maupertuis principle in dynamics, Reports on Mathematical Physics, vol.63, issue.3, pp.331-346, 2009.
DOI : 10.1016/S0034-4877(09)00015-9

D. Scerrato, I. A. Zhurba-eremeeva, T. Lekszycki, and N. L. Rizzi, On the effect of shear stiffness on the plane deformation of linear second gradient pantographic sheets, ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift f??r Angewandte Mathematik und Mechanik, vol.1, issue.2, pp.1268-1279, 2016.
DOI : 10.1061/(ASCE)NM.2153-5477.0000030

D. J. Steigmann and F. Dell-'isola, Mechanical response of fabric sheets to three-dimensional bending, twisting, and stretching, Acta Mechanica Sinica, vol.52, issue.79, pp.373-382, 2015.
DOI : 10.1016/j.compositesa.2008.02.016
URL : https://hal.archives-ouvertes.fr/hal-01198464

R. A. Toupin, Theories of elasticity with couple-stress, Archive for Rational Mechanics and Analysis, vol.17, issue.2, pp.85-112, 1964.
DOI : 10.1007/BF00253050
URL : https://hal.archives-ouvertes.fr/hal-00853382

E. Turco, M. Golaszewski, A. Cazzani, and N. L. Rizzi, Large deformations induced in planar pantographic sheets by loads applied on fibers: Experimental validation of a discrete Lagrangian model, Mechanics Research Communications, vol.76, pp.51-56, 2016.
DOI : 10.1016/j.mechrescom.2016.07.001

J. Yang and R. S. Lakes, Experimental study of micropolar and couple stress elasticity in compact bone in bending, Journal of Biomechanics, vol.15, issue.2, pp.91-98, 1982.
DOI : 10.1016/0021-9290(82)90040-9