TY - JOUR AU - Slavica Ristić TI - A - a view in the invisible JO - Theoretical and applied mechanics PY - 2013 SP - 87 VL - 40 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2298/TAM1301087R/ DO - 10.2298/TAM1301087R LA - en ID - 10_2298_TAM1301087R ER -