The upper and lower second order directional derivatives of a sup-type function
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1990 ◽
Vol 66
(3)
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pp. 489-502
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2005 ◽
Vol 50
(5-6)
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pp. 947-955
2005 ◽
Vol 26
(5)
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pp. 1725-1743
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2001 ◽
Vol 46
(8)
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pp. 1133-1150
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1997 ◽
Vol 22
(3)
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pp. 747-753
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2013 ◽
Vol 21
(3)
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pp. 557-586
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