APA (7th ed.) Citation

Lonka, H., & Tammi, O. (1968). On the use of step-functions in extremum problems of the class with bounded boundary rotation. Suomalainen Tiedeakatemia.

Chicago Style (17th ed.) Citation

Lonka, Harri, and Olli Tammi. On the Use of Step-functions in Extremum Problems of the Class with Bounded Boundary Rotation. Helsinki: Suomalainen Tiedeakatemia, 1968.

MLA (9th ed.) Citation

Lonka, Harri, and Olli Tammi. On the Use of Step-functions in Extremum Problems of the Class with Bounded Boundary Rotation. Suomalainen Tiedeakatemia, 1968.