APA (7th ed.) Citation

Wambsganß, J., & Schneider, P. (1991). Are the broad emission lines of quasars affected by gravitational microlensing? Lecture notes in physics, 377(?), . https://doi.org/10.1007/BFb0030073

Chicago Style (17th ed.) Citation

Wambsganß, Joachim, and Peter Schneider. "Are the Broad Emission Lines of Quasars Affected by Gravitational Microlensing?" Lecture Notes in Physics 377, no. ? (1991). https://doi.org/10.1007/BFb0030073.

MLA (9th ed.) Citation

Wambsganß, Joachim, and Peter Schneider. "Are the Broad Emission Lines of Quasars Affected by Gravitational Microlensing?" Lecture Notes in Physics, vol. 377, no. ?, 1991, https://doi.org/10.1007/BFb0030073.