Geodesic
Truncated differential characteristics with minimum number of active bytes for simplified Whirlpool
Prikladnaya Diskretnaya Matematika. Supplement, no. 5 (2012), pp. 41-43

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In this paper, a truncated differential characteristics with minimum number of active bytes is built to produce a collision for two reduced variants of the hash function Whirlpool: with 1 and 2 rounds in the underlying block-cypher instead of 14. For the first variant this number equals 23, for the second one – 45. The probabilities of these characteristics are maximal and equal $2^{-115}$ and $2^{-225}$ respectively. 
@article{PDMA_2012_5_a21,
     author = {A. A. Kamaeva},
     title = {Truncated differential characteristics with minimum number of active bytes for simplified {Whirlpool}},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {41--43},
     publisher = {mathdoc},
     number = {5},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2012_5_a21/}
}
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A. A. Kamaeva. Truncated differential characteristics with minimum number of active bytes for simplified Whirlpool. Prikladnaya Diskretnaya Matematika. Supplement, no. 5 (2012), pp. 41-43. http://geodesic.mathdoc.fr/item/PDMA_2012_5_a21/