Analytical Letters A

1988. V. 21 № 1/4,2/4,3/4,4/4,5/4,6/4,7/5,8/5,9/5,10/4,11/5,12/6

1987. V. 20 № 1/4,2/4,3/3,4/4,5/4,6/3,7/4,8/4,9/4,10/4,11/4,12/2

1986. V. 19 № 1-2/5, 3-4/5, 5-6/5, 7-8/5, 9-10/5, 11-12/4, 13-14/4, 15-16/4, 17-18/4, 19-20/4, 21-22/4, 23-24/4