Antihypertensive Effects of Osteospermum Imbricatum in Two Hypertensive Rat Models, Tata, Charlotte Mungho, Sewani-Rusike Constance Rufaro, Aremu Olukayode, Oyedeji Opeoluwa Oyehan, and Nkeh-Chungag Benedicta Ngwenchi , Pharmacognosy Journal, May 2021, Volume 13, Issue 3, p.744-751, (2021)