TY  - DATA
AU  - M.R. Essen
TI  - The Cos pi Lambda Theorem
T2  - Lecture Notes in Mathematics
SN  - 9783540375135
PY  - 1975///
CY  - Heidelberg
PB  - Springer Berlin
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0094969
ER  -