1 19888503_a2016v19n2 1 19888503_a2019v22n2 2 19888538 1 19888538_a2013v93n1 1 19888538_a2022v102n1 - 19888732v16 37 1989 1 1989-0613_a2017mvn176 1 1989-0613_a2019mvn184 1 1989-063x_a2019m7-12vn42 1 1989-1342_a2016m2v10n