APA (7th ed.) Citation

Hoppe, R. H. W., & Wagner, F. (1993). A time-parallel multigrid method for two-phase Stefan problems.

Chicago Style (17th ed.) Citation

Hoppe, Ronald H. W., and Frank Wagner. A Time-parallel Multigrid Method for Two-phase Stefan Problems. München, 1993.

MLA (9th ed.) Citation

Hoppe, Ronald H. W., and Frank Wagner. A Time-parallel Multigrid Method for Two-phase Stefan Problems. 1993.