by Kheng, Valentine, Zichello, Julia M., Lumbantobing, Daniel N., Lawalata, Shobi Z. S., Andayani, Noviar, Melnick, Don J.
Published in International journal of primatology (01.02.2018)

by Bachtiar, Indra, Kheng, Valentine, Wibowo, Gunawan A, Gani, Rino A, Hasan, Irsan, Sanityoso, Andri, Budhihusodo, Unggul, Lelosutan, Syafruddin Ar, Martamala, Ruswhandi, Achwan, Wenny A, Soemoharjo, Soewignyo, Sulaiman, Ali, Lesmana, Laurentius A, Tai, Susan
Published in BMC research notes (23.11.2010)