Shtokalko consistently collected the smallest snippets of information about the bandura and the kobzari and was able to include them in his performances.

Shtokalko can also be credited with the revival of the ancient byliny (traditional epic poems) of Kievan Rus'.

In his repertoire Shtokalko had a huge reserve of historic songs and dumy (sung epic poems), many of which were recorded during the life of the bandurist.

Maksymiuk also discovered a recording of the duma "Kozak Holota" which was done live by an amateur collector during a concert performance of Shtokalko.

These three dumy were after editing together with "Marusia Bohuslavka" appeared as a record album sponsored by Myron Surmach of the Surma bookstore in New York City.

The album "O, Dumy Moyi - Pamyati Bandurysta Z. Shtokalka (О, Думи Мої - Пам'яті Бандуриста З. Штокалка)" was released in 1970 on two long play 33 1/3 rpm records.