1 papers_a2014v99n4 8 papers_a2015m1-3v100n1 11 papers_a2015m10-12v100n4 7 papers_a2015m4-6v100n2 7 papers_a2015m7-9v100n3 - papers_a2015v100n1 6 papers_a2016m1-3v101n1 6 papers_a2016m10-12v101n4 9 papers_a2016m4-6v101n2 5 papers_a2016m7-9v101n3 5 papers_a2017m1-3v102n1