kim et al. 2006, kim et al. 2006 ammonia and nitrogen, kim et al. 2015, kim et al. 2017, kim et al. 2011a 2011b, kimmel et al. 1995, kim et al. 2019, kim et al. 2018, roberts et al. 2006, yu et al. 2006, kumar et al 2006
kim et al. 2006. There are any references about kim et al. 2006 in here. you can look below.