Ussabayev Arman, Caroline Aggestam Pontoppidan, и Ussabayev Damir. 2019. «ACTUAL PROBLEMS OF ACCOUNTING OF CONCESSION ASSETS AND LIABILITIES IN THE REPUBLIC OF KAZAKHSTAN». «Вестник НАН РК», вып. 2 (апрель):28-36. https://journals.nauka-nanrk.kz/bulletin-science/article/view/1704.