How to cite Ladybug and Honeybee legacy plugins?

Ladybug and Honeybee are two open source plugins for Grasshopper and Rhinoceros that help explore and evaluate environmental performance. Ladybug imports standard EnergyPlus weather files (.EPW) into Grasshopper and provides a variety of 3D interactive graphics to support the decision-making process during the initial stages of design. Honeybee connects the visual programming environment of Grasshopper to four validated simulation engines - specifically, EnergyPlus, Radiance, Daysim and OpenStudio - which evaluate building energy consumption, comfort, and daylighting (Sadeghipour Roudsari M., Pak M., 2013). These plugins enable a dynamic coupling between the flexible, component-based, visual programming interface of Grasshopper and validated environmental data sets and simulation engines.

Sadeghipour Roudsari, Mostapha; Pak, Michelle, 2013. Ladybug: a parametric environmental plugin for grasshopper to help designers create an environmentally-conscious design. In: Proceedings of the 13th International IBPSA Conference Held in Lyon, France Aug 25–30th. (http://www.ibpsa.org/proceedings/BS2013/p_2499.pdf)