c – How to set up a cron job to run an executable every hour? – Stack Overflow http://stackoverflow.com/questions/3474280/how-to-set-up-a-cron-job-to-run-an-executable-every-hour
CrontabExamples – ncrontab – Examples of crontab expressions – Crontab for .NET – Google Project Hosting https://code.google.com/p/ncrontab/wiki/CrontabExamples