Back to top References ↑ Fetkovich, M. J., Fetkovich, E. J., & Fetkovich, M. D. 1996. Useful Concepts for Decline Curve Forecasting, Reserve Estimation, and Analysis. Offering my customers healthy, life-giving, precious food is the best way for me to help them. This API is currently in «preview» mode, but please don’t let that change your mind. While we have many developers using them all over the world, we are still doing some additional building and testing until we feel really comfortable that they are just right for general consumption. Go ahead, grab a key and try them.