TY  - DATA
AU  - H. Haken, S. Nikitine
TI  - Excitons at High Density
SN  - 9783540378662
PY  - 1975///
PB  - Springer Berlin Heidelberg
KW  - Physics and Astronomy
UR  - https://doi.org/10.1007/BFb0041578
ER  -