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[2]
FUKUZAWA A, 1972, TETRAHEDRON LETT, P3
[3]
FURUSAKI A, 1973, TETRAHEDRON LETT, P4579
[6]
IRIE T, 1968, TETRAHEDRON LETT, P2091
[8]
KUROSAWA E, 1973, TETRAHEDRON LETT, P3857
[9]
KUROSAWA E, 1973, TETRAHEDRON LETT, P4135