TY - Acta Entomologica Sinica A1 - T1 - Effects of four podophyllotoxin analogues on spontaneous action potentials of the ventral nerve cord of Periplaneta americana (Blattaria: Blattidae) Y1 - 2009-03-18 JF - Acta Entomologica Sinica JO - Acta Entomologica Sinica SP - 168 EP - 174 VL - 52 IS - 2 UR - http://www.insect.org.cn N1 - ER -