Kovach, L. D. (1984). Boundary-value problems. Addison-Wesley.
Chicago-čujuhus (17. p.)Kovach, Ladis D. Boundary-value Problems. Reading: Addison-Wesley, 1984.
MLA-čujuhus (9. p.)Kovach, Ladis D. Boundary-value Problems. Addison-Wesley, 1984.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.