function sendTokensToAdvisors(address _advisorsAddress) public onlyOwner returns (bool) {
        require (_advisorsAddress != address(0x0));
        require (!sendedToAdvisors);
        require (sale.getEndDate() > 0 && now > sale.getEndDate());
        sendedToAdvisors = true;
        _mint(_advisorsAddress, advisorsPart);
        return true;
    }