Here are some tools that allow the conversion to BiBTeX format from various sources.
Error bars may show confidence intervals, standard errors, and standard deviations. Each feature conveys a different message and this paper on error bars in experimental biology explains it very nicely. For this post I will demonstrate how to plot error bars that show the standard error (SE) or standard error of the mean (SEM). I found two nice resources that demonstrate the plotting of error bars with R and in this post I illustrate them with simple examples. The first method is from the website of James Holland Jones, where he wrote an R function that plots arrows to a bar plot.