1
Published in 1981
doi: 10.1016/0016-7037(81)90275-1
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6
Published in 1984
doi: 10.1016/0009-2541(84)90148-7
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7
Published in 1984
doi: 10.1016/0009-2541(84)90149-9
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13
Published in 2006
doi: 10.1144/pygs.56.2.155
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