Fischer, H. E. (1993): Framework for Conducting Empirical Observations of Learning Processes.

Fischer, H. E. (1993). Framework for Conducting Empirical Observations of Learning Processes.. Science Education, 77(2), 131–151.@article{fischer1993, title={Framework for Conducting Empirical Observations of Learning Processes.}, author={Hans E. Fischer}, year={1993}, journal={Science Education}, volume={77}, number={2}, pages={131--151} } 