APA (7th ed.) Citation

(1975). The cos [math symbol pi Greek symbol lambda] theorem / Matts R. Essén, with a paper by Christer Borell.

Chicago Style (17th ed.) Citation

The Cos [math Symbol Pi Greek Symbol Lambda] Theorem / Matts R. Essén, with a Paper by Christer Borell. 1975.

MLA (9th ed.) Citation

The Cos [math Symbol Pi Greek Symbol Lambda] Theorem / Matts R. Essén, with a Paper by Christer Borell. 1975.