@article{weko_202716_1,
   author	 = "Yusuke,Fukazawa and Naoki,Yamamoto and Takashi,Hamatani and Keiichi,Ochiai and Akira,Uchiyama and Ken,Ohta",
   title	 = "Smartphone-based Mental State Estimation: A Survey from a Machine Learning Perspective",
   journal	 = "情報処理学会論文誌",
   year 	 = "2020",
   volume	 = "61",
   number	 = "1",
   month	 = "jan"
}