Possibility of Using Astaxanthin-Rich Dried Cell Powder from Paracoccus carotinifaciens to Improve Egg Yolk Pigmentation of Laying Hens. - Masaki Honda; Yuki Kawashima; Kazuaki Hirasawa; Takeshi Uemura; Sun Jinkun; Yoshiaki Hayashi (Symmetry, 2020)