Benjamin B. Bederson Aaron Clamage Mary Czerwinski George G. Robertson DateLens: A fisheye calendar interface for PDAs. 90-119 2004 11 ACM Trans. Comput.-Hum. Interact. 1 http://doi.acm.org/10.1145/972648.972652 db/journals/tochi/tochi11.html#BedersonCCR04