1. Daniel Kucera: https://github.com/danielkucera , https://blog.danman.eu

2. "[PATCH] implemented CMD42 locking unlocking" and "[PATCH] mmc-utils: implemented CMD42 locking/unlocking" https://lore.kernel.org/linux-mmc/

3. "mmc: core: allow detection of locked cards" and "mmc: core: allow detection of locked cards": https://patchwork.kernel.org/project/linux-mmc/list/

4. "Requesting a Linux kernel patch that makes a locked sd card visible in the /dev directory #3": https://github.com/alcooper/mmc-password-utils/issues/3