sentences:  Tetra Pak was asked by Italian authorities to provide documentation on the transactions, and found that payments had been made since 1995 as part of regular operations but that no payments had been made specifically to the Tanzi family.Calisto Tanzi was eventually sentenced to eight years imprisonment for fraud by the Italian high court in Milan after several appeals in lower courts.When visiting the Tetra Pak factory in Lund in the 1950s, Danish physics professor and Nobel Prize laureate Niels Bohr allegedly claimed to "never have seen such an adequate practical application of a mathematical problem" as the tetrahedron package and the innovation of the milk tetrahedron.