APA (7e ed.) Bronvermelding

Howison, S., Morgan, J., & Ockendon, J. (1997). A class of codimension-two free boundary problems.

Chicago (17e ed.) Bronvermelding

Howison, S., J. Morgan, en J. Ockendon. A Class of Codimension-two Free Boundary Problems. 1997.

MLA (9e ed.) Bronvermelding

Howison, S., et al. A Class of Codimension-two Free Boundary Problems. 1997.