TY  - RPRT
TI  - PERIODICITY IN SEQUENCES DEFINED BY LINEAR RECURRENCE RELATIONS.
AU  - H T Engstrom
PY  - 1930
DO  - 10.1073/pnas.16.10.663
UR  - https://pubmed.ncbi.nlm.nih.gov/16577288/
ID  - 16577288
ER  -