Shyshchak, Olena2012-10-012012-10-012012Shyshchak O. VI-th scientific-technical conference “Advance in petroleum and gas industry and petrochemistry” / Olena Shyshchak // Chemistry & Сhemical Тechnology. – 2012. – Volume 6, number 3. – Р. III–IV.https://ena.lpnu.ua/handle/ntb/14762enArticle