O Sezer, U Heider, I Zavrski, and K Possinger. 2001. “Differentiation of Monoclonal Gammopathy of Undetermined Significance and Multiple Myeloma Using Flow Cytometric Characteristics of Plasma Cells”. Haematologica 86 (8). Pavia, Italy, 837-43. https://haematologica.org/article/view/2099.