Using benzo[a]pyrene in willow leaves as an indicator for assessing the toxic equivalent concentration of PAHs in a coking industrial area - Guohui Xia; Yuan Gao; Handan Zhang; Yujing Wang; Lu Dong; Pengcheng Li; Mengzhu Xue; Kening Wang; Xin Zhang; Liping Li; Xinhui Liu (Journal of Environmental Management, 2026)