Published works may be used personally by anybody. It has to be distinguished between the private use as such and the internal use within a company or society. If somebody is allowed to use a work personally, he may have produced the necessary copies by a third party. Such reproduction is allowed under the conditions that the reproduction is for the personal use of the principal only and that the principal keeps the authority over the purpose and extent of the reproduction. In any case it is prohibited to ask the third party to make copies in stock.