KAUSAR, T., and S. ZAFAR. “?INTRODUCTION OF TOWER SYSTEM FOR THE CULTIVATION OF MUSHROOMS (PLEUROTUS SPP.)”. Biological Sciences - PJSIR, vol. 38, no. 9-10, Oct. 1995, pp. 362-4, https://v2.pjsir.org/index.php/biological-sciences/article/view/2521.