@incollection{,
	
					
					
					C5A89548EC89682E33ECC74C13B83C22
				,
	author={{AHM SaifulIslam} and {Md SanjuIslam} and {ShaheenaSultana} and {MariaIslam} and {Notre Dame University Bangladesh}},
	journal={{Global Journal of Computer Science and Technology}},
	journal={{GJCST}}0975-41720975-435010.34257/gjcst,
	address={Cambridge, United States},
	publisher={Global Journals Organisation}2122128
}

@book{b0,
	
	
		,
	title={{Coronavirus disease (covid-19) -world health organization}}
		
		
	

}

@book{b1,
	
	
		,
	title={{What is a virtual classroom?-online learning solutions by raccoon gang}}
		
		
	

}

@book{b2,
	
	
		,
	title={{}}
		,
	author={{
			Easymeeting
		}}
		
		
			,
	year={14 April 2020}
		
	

}

@book{b3,
	
	
		,
	title={{}}
		,
	author={{
			Gotomeeting
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b4,
	
	
		,
	title={{}}
		,
	author={{
			Proficonf
		}}
		
		
			,
	year={April 2020}
		
	

}

@incollection{b5,
	
	
		,
	title={{}}
		
	
	
		,
	journal={{Adobe connect, Accessed}}
		
			15
			,
	year={April 2020}
		
	

}

@book{b6,
	
	
		,
	title={{}}
		,
	author={{
			Bluejeans
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b7,
	
	
		,
	title={{Accessed 15}}
		,
	author={{
			Braincert
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b8,
	
	
		,
	title={{}}
		,
	author={{
			Eztalks
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b9,
	
	
		,
	title={{Accessed 15}}
		,
	author={{
			Fuze
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b10,
	
	
		,
	title={{Accessed 15}}
		,
	author={{
			Gomeetnow
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b11,
	
	
		,
	title={{Accessed 15}}
		,
	author={{
			GoogleCloud
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b12,
	
	
		,
	title={{Accessed 15}}
		
		
			,
	year={April 2020}
		
	

}

@book{b13,
	
	
		,
	title={{}}
		,
	author={{
			Intermedia
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b14,
	
	
		,
	title={{Join me, Accessed 15}}
		
		
			,
	year={April 2020}
		
	

}

@book{b15,
	
	
		,
	title={{}}
		,
	author={{
			Megameeting
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b16,
	
	
		,
	title={{Accessed 15}}
		,
	author={{
			Mikogo
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b17,
	
	
		,
	title={{}}
		,
	author={{
			Pgi
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b18,
	
	
		,
	title={{Accessed 15}}
		,
	author={{
			Ringcentral
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b19,
	
	
		,
	title={{}}
		,
	author={{
			Skype
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b20,
	
	
		,
	title={{}}
		,
	author={{
			Uberconference
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b21,
	
	
		,
	title={{}}
		,
	author={{
			Webroom
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b22,
	
	
		,
	title={{Accessed 15}}
		,
	author={{
			Zoho
		}}
		
		
			,
	year={April 2020}
		
	

}

@book{b23,
	
	
		
		,
	title={{Digital in bangladesh 2019 report. Hype}}
				
			,
	year={August 2019}
		
	

}

@book{b24,
	
	
		,
	title={{5 reasons why a virtual classroom better than a real one. dexway}}
		
		
			,
	year={February 28, 2019}
		
	

}

@book{b25,
	
	
		,
	title={{Characteristics of a virtual classroom}}
		
		
			,
	year={January 2020}
		
	
	,
	note={Learn-Dash}

}

@book{b26,
	
	
		,
	title={{Definition -what is a virtual classroom? Learn Cube}}
		,
	author={{
			AlexAsher
		}}
		
		
	

}