Wen-Ping Chen Song-Shyong Chen Chun-Cheng Lin Ya-Zhung Chen Wen-Chih Lin Automatic recognition of frog calls using a multi-stage average spectrum. 1270-1281 2012 64 Comput. Math. Appl. 5 https://doi.org/10.1016/j.camwa.2012.03.071 https://www.wikidata.org/entity/Q133883541 db/journals/cma/cma64.html#ChenCLCL12