URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::32890c96056862891db76e1530ab5921https://doi.org/10.5594/j18017xy
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::48c2f28a1c6326bf3e001927daabb25ehttps://doi.org/10.5594/j00181