Peter E. Wellstead. An instrumental product moment test for model order estimation. Automatica, 14(1):89-91, 1978. [doi]
@article{Wellstead78,
title = {An instrumental product moment test for model order estimation},
author = {Peter E. Wellstead},
year = {1978},
doi = {10.1016/0005-1098(78)90079-1},
url = {http://dx.doi.org/10.1016/0005-1098(78)90079-1},
researchr = {https://researchr.org/publication/Wellstead78},
cites = {0},
citedby = {0},
journal = {Automatica},
volume = {14},
number = {1},
pages = {89-91},
}