Kovach, L. D. (1984). Boundary-value problems. Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Kovach, Ladis D. Boundary-value Problems. Reading: Addison-Wesley, 1984.
Lua MLA (9ú heag.)Kovach, Ladis D. Boundary-value Problems. Addison-Wesley, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.