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vol10no10pp396_401_164345.pdf
vol10no11pp416_430_368666.pdf
vol7no9pp177_209_828382.pdf
vol8no7pp230_236_186001.pdf
vol8no8pp256_266_309070.pdf
vol9no3pp59_66_217594.pdf
vol10no7pp247_290_1161472.pdf
vol7nos2&3pp43_45_89398.pdf