bv3ue radio blog: Black Pill(STM32F103C8T6) to work with Arduino
Marrold's Blog: Flashing a bootloader on to an STM32 'Blue Pill' using a Raspberry Pi
STM32 USB UPLOAD | alselectro
STM32 Clones: The Good, The Bad And The Ugly | Hackaday
GitHub - DAlexis/stm32-usb-bootloader: This repository contains bootloader for stm32f1xx microcontrollers. It works for stm32f103ret6, but you can simply adopt it to any MCU supporting STM32 HAL library with USB and SD-card
Use Android to Flash STM32 BigClown Modules - Hackster.io
Programming STM32F103C8 Board (Blue Pill) using USB Port
STM32 Bootloader: Programming STM32F103C8 via USB Port
How to Install the STM32 USB Bootloader, New Version! (Blue Pill F103C8T6) - YouTube | Blue pill, Pill, Arduino
Set up STM32 "blue pill" for Arduino IDE · One Transistor