@book{18115,
	author = {Hardy Darel W and  Richman Fred},
	title = {Applied algebra: Codes, ciphers and discrete algorithms},
	publisher = {CRC Pres     },
	year = {2009},
	series = {Discrete mathematics and its applications},
	address = {Boca Raton },
	edition = {2},
	note = {''References 395-398p''.; ''Index 405-410p''.}
}