bcf2vdb uses the following thrird party libraries:

Boost
    http://www.boost.org/
    http://www.boost.org/LICENSE_1_0.txt

OpenEXR
    http://www.openexr.com/
    http://www.openexr.com/license.html

OpenVDB
    http://www.openvdb.org/
    https://www.mozilla.org/en-US/MPL/2.0/

Intel Threading Building Blocks
    http://threadingbuildingblocks.org/
    https://github.com/01org/tbb/blob/tbb_2017/LICENSE

zlib
    http://zlib.net
    http://zlib.net/zlib_license.html
