Update citation instructions

Added BibTeX snippets for increased convenience.

README.md

@@ -30,4 +30,45 @@ If you want to contribute, you should...
 # Usage and Citing
 `bletl` is licensed under the [GNU Affero General Public License v3.0](https://github.com/JuBiotech/bletl/blob/main/LICENSE.md).
 
+When using `bletl` in your work, please cite the [Osthege & Tenhaef et al. (2022) paper](https://doi.org/10.1002/elsc.202100108) __and__ the [corresponding software version](https://doi.org/10.5281/zenodo.5101434).
+
+Note that the paper is a shared first co-authorship, which can be indicated by <sup>1</sup> in the bibliography.
+
+```bibtex
+@article{bletlPaper,
+  author   = {Osthege$^1$, Michael and
+              Tenhaef$^1$, Niklas and
+              Zyla, Rebecca and
+              Müller, Carolin and
+              Hemmerich, Johannes and
+              Wiechert, Wolfgang and
+              Noack, Stephan and
+              Oldiges, Marco},
+  title    = {bletl - A Python package for integrating {B}io{L}ector microcultivation devices in the {D}esign-{B}uild-{T}est-{L}earn cycle},
+  journal  = {Engineering in Life Sciences},
+  volume   = {22},
+  number   = {3-4},
+  pages    = {242-259},
+  keywords = {BioLector, feature extraction, growth rate, microbial phenotyping, uncertainty quantification},
+  doi      = {https://doi.org/10.1002/elsc.202100108},
+  url      = {https://onlinelibrary.wiley.com/doi/abs/10.1002/elsc.202100108},
+  eprint   = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/elsc.202100108},
+  year     = {2022}
+}
+
+@software{bletl,
+  author       = {Michael Osthege and
+                  Niklas Tenhaef and
+                  Laura Helleckes and
+                  Carolin Müller},
+  title        = {JuBiotech/bletl: v1.1.0},
+  month        = feb,
+  year         = 2022,
+  publisher    = {Zenodo},
+  version      = {v1.1.0},
+  doi          = {10.5281/zenodo.6284777},
+  url          = {https://doi.org/10.5281/zenodo.6284777}
+}
+```
+
 Head over to Zenodo to [generate a BibTeX citation](https://doi.org/10.5281/zenodo.5101434) for the latest release.