Login New user?   04-Information Sciences Letters An International Journal   ISL Home   Aim and Scope   For Reviewers   For Authors   Editorial Board   Publication Ethics   Processing Charges   Indexing   Submit an Article   Content   Forthcoming Papers   Subscription Author     Name : J. A. Br Sinaga Address : Doctoral Graduate School of Mathematics, Universitas Sumatera Utara, Medan, Indonesia\\ Universitas HKBP Nommensen Pematangsiantar, Pematang Siantar, Indonesia Email : julysinaga654@gmail.com Telephone :   Home   About us   News   Journals   Conferences Contact us Copyright naturalspublishing.com. All Rights Reserved