APA (7th ed.) Citation
(1991). Arbitrary powers of D'alembertians and the huygengs' principle. [s.n.].
Chicago Style (17th ed.) Citation
Arbitrary Powers of D'alembertians and the Huygengs' Principle. [s.l.]: [s.n.], 1991.
MLA (9th ed.) Citation
Arbitrary Powers of D'alembertians and the Huygengs' Principle. [s.n.], 1991.
Warning: These citations may not always be 100% accurate.