Sharif University of Technology Sharif Journal of Civil Engineering 2676-4768 Vol. 21 No. 30 2005 06 22 ANALYSIS OF DISEASE TRANSMISSION MODEL IN AN OPEN ENVIRONMENT ANALYSIS OF DISEASE TRANSMISSION MODEL IN AN OPEN ENVIRONMENT 3 6 211 FA M. Hesaraki School of Mathematical Sciences, Sharif University S. M. Moghadac Faculty of Science - Department of Mathematics, Nasir al-Din Toosi University of Technology Khvaj Journal Article 2011 05 08 - - https://sjce.journals.sharif.edu/article_211_3b24eb82915dbb2c81c7c8ce18ac6501.pdf