If one takes a broader historical perspective, one can see even some elements of the Greek cursive script.
They were originally in the Bactrian language and written in Greek script.
On the ring is an inscription written in a Greek script which says:
After examination he realized that they were part of the Septuagint, written in an early Greek uncial script.
Before the advent of the codex (book), Latin and Greek script was written on scrolls.
The letter, in tiny Greek script, appeared on two pages that had been used as the endpaper and the binding of a 17th-century book.
To this general rule the Greek script is no exception.
The use of the Greek script however remained to write Bactrian.
The glagolitic alphabet was probably an adaptation from the old Greek cursive script.
In a broader historical perspective, it is possible to see some elements of the Greek cursive script.