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vol9no3pp67_73_197451.pdf
vol9no4pp77_117_1031774.pdf
vol9no12pp359_385_799146.pdf
vol10no6pp181_215_870737.pdf
vol10no8pp295_303_219287.pdf
vol8no2pp36_47_323008.pdf
vol23no9pp155_166_595747.pdf
vol23no7pp113_125_623400.pdf
vol21no3pp41_56_799921.pdf