%0 Journal Article %A E. I. Pokrovskii %A M. V. Vol'kenshtein %T A study of isotactic polypropylene by means of infrared spectra %J Doklady Akademii Nauk %D 1957 %P 552-553 %V 115 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1957_115_3_a33/ %G ru %F DAN_1957_115_3_a33