TY - JOUR AU - M. A. Pudovkina TI - Properties of $X,S$-layers JO - Prikladnaya Diskretnaya Matematika. Supplement PY - 2012 SP - 26 EP - 28 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PDMA_2012_5_a12/ LA - ru ID - PDMA_2012_5_a12 ER -