Bip39 entropy http://www.mediafire.com/file/uilrjfajg2ami24/pdf-14673-57158.pdf Though it utilizes BIP32 process you may nevertheless import BIP39 seeds into Electrum wallet. Also besides BIp32 You can find BIP44 Edition which some wallet use for your generation of seeds. One example is, when you originally create your wallet and produced seed utilizing Ledger Nano S https://ilovebookmarking.com/story20054805/bip39-nedir-a-secret-weapon-for-bip39-mnemonic-https-x-com-tundra838554