参考文献

Mathad, Vijayavitthal T.; Shinde, Gorakshanath B.; Ippar, Sharad S.; Niphade, Navnath C.; Panchangam, Raghavendra K.; Vankawala, Pravinchandra J. Synthetic Communications, 2011 , vol. 41, # 3 p. 341 - 346