Ningsih, Ana, 		Wicaksono, Luthfi, AND 		Ma'ruf, Mokhamad.
" PLANNING OF SOFT SOIL IMPROVEMENT WITH PRELOADING AND PREFABRICATED VERTICAL DRAIN METHOD" <em>Jurnal Rekayasa Sipil dan Lingkungan</em> [Online], Volume 2 Number 01 (5 July 2018)