In January 1944, Shankovsky, as a leader of the UPA forces, headed the initiating commission that established contacts with representatives of former Ukrainian political parties as well as nonpartisan activists.
Author publications: "Ukrainian Liberation Movement in Modern Times" (1951), "UPA and Its Clandestine Literature" (1952), "The Original Group of OUN" (1958), "Ukrainian Insurgent Army in the struggle for statehood" (1958), "Ukrainian Galician Army" (1974).