URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d0e58a87db6157b268246806ad268c1http://www.annals.in/article.asp?issn=0971-9784;year=2012;volume=15;issue=1;spage=88;epage=90;aulast=Datt
URL الوصول: https://doaj.org/article/263f0eb2623d407dbd5a0bf03b153fc0
URL الوصول: https://doaj.org/article/0201e78b68584201b7b9ec5dcb145245