css - Split button dropdown aligned to first button - Stack Overflow
Dropdown (Bootstrap) - NSB App Studio
Twitter Bootstrap Dropdown Button - Damien Antipa
Bootstrap 5 Dropdowns - javatpoint
Keep Dropdown Button Size and Position When Clicked - General - Bootstrap Studio Forum
GitHub - mdbootstrap/bootstrap-dropdown-button: Responsive Dropdown Button built with Bootstrap 5. Dropdown can be created with the use of a button or link elements.