@article{031334195,
title = "Evaluation of urine urea nitrogen and creatinine on the Monarch-Plus",
author = "Velazquez, F.R. and Philipp, K. and Weisinger, S. and Altaffer, M. and Upham, S.",
year = "1993",
journal = "Clinical Chemistry",
volume = "39",
number = "6",
pages = "1178",
issn = "0009-9147",
url = "https://eurekamag.com/research/031/334/031334195.php"
}