APA (7th ed.) Citation

Engel, T., Signer, A., & Ulrich, Y. A subtraction scheme for massive QED. SpringerOpen.

Chicago Style (17th ed.) Citation

Engel, T., A. Signer, and Y. Ulrich. A Subtraction Scheme for Massive QED. SpringerOpen.

MLA (9th ed.) Citation

Engel, T., et al. A Subtraction Scheme for Massive QED. SpringerOpen.

Warning: These citations may not always be 100% accurate.